Straight answers about
buying a used car.

102 pieces on how used car deals actually work — the arithmetic, the paperwork, the condition of the metal, and the parts of the process nobody volunteers. Written by a small lot in New Jersey that has to live with what it publishes.

Browse by subject

Everything, newest first

• "What's your monthly budget?"

  An annotated transcript of the conversation that decides most car deals, with margin notes on what each line is doing.

  Money

• A first car for a teenager

  Small, cheap, slow, exciting, newest possible, in their name. Six good instincts, and the case against each one.

  Buying

• A week on a small lot

  Monday to Sunday on a six-car lot, including the parts nobody puts in a brochure.

  Buying

• APR is not the interest rate

  One contract, two percentages, and the reason they don't match - worked all the way through.

  Money

• AWD, 4WD, and what you need here

  Five layouts, drawn. What each one actually sends power to, and what that's worth on a New Jersey road in February.

  Condition

• Adding a second car

  What a second vehicle costs before it moves, and what that works out to per use.

  Money

• As-is in New Jersey

  The window sticker, the As Is box, the factory warranty that survives it, and the promises that only count in writing.

  Paperwork

• Buying a car in winter

  What the cold exposes on a used car, what it conceals, and how to buy around both.

  Buying

• Buying a car out of state

  The extra steps in sequence, and the branch that comes off each one where it goes wrong.

  Paperwork

• Buying a used EV

  Degradation, charging history, and the readouts worth asking for — plus what a state-of-health number is and isn't.

  Condition

• Buying a used turbo car

  What forced induction adds to a used car, what it asks of the oil, and how the failures actually present themselves.

  Condition

• Buying a vehicle for work

  The things buyers discover in month three, arranged by when they tend to show up.

  Buying

• Buying after a repossession

  Ten questions worth answering before you shop again. No promises, no rates, no predictions.

  Money

• Buying for a growing family

  A worksheet for the parking lot. Bring a tape measure, your own seat, and the stroller.

  Buying

• Buying for a long commute

  Ten criteria, ranked by how much each one matters once you are driving 25,000 miles a year.

  Buying

• Buying with damaged credit

  What a lender is looking at, what a down payment does, and the option nobody sells you. No promises, no rates.

  Money

• Certified pre-owned, examined

  Certified is not one standard. Six claims about CPO taken one at a time — and the one document that settles all of them.

  Condition

• Color, options, and what holds value

  Three questions, run over nine options and colors. A framework, deliberately without invented resale figures.

  Buying

• Dashboard lights, ranked

  From finish your drive to stop the car now, with the reasoning for each rank.

  Condition

• Dealer-speak, decoded

  Twenty-two words you will hear in a car deal, defined plainly - and what each one actually does to the number you pay.

  Buying

• Does one-owner actually matter?

  Four things people assume one-owner means, each rated on how much the fact really supports it.

  Buying

• Donating or selling an old car

  Five exits for a tired car - and an honest account of when donation is and isn't the better one.

  Selling

• Field notes from the lot

  Twenty-two numbered observations from six cars and a front row. No connecting argument.

  Buying

• Finding a mechanic you can keep

  What a good shop does in front of you, staged across the first call, the first small job and the first real bill.

  Owning

• Floorplan: the loan on the cars

  The draw, the held title, the curtailment, and the day somebody walks the lot counting VINs.

  Money

• Fluids: what the color means

  A swatch chart for every fluid under a used car, and the ones color cannot tell you about.

  Condition

• Gap insurance, examined

  A decision flow: the conditions under which gap coverage earns its cost, and the conditions under which it is money for nothing.

  Money

• Getting a car ready to sell

  Ranked by return on effort - and the five jobs that are not worth doing at all.

  Selling

• Getting out of a payment that's too big

  Nine ways out, each with its real cost, including the ones that make it worse.

  Money

• Getting your own loan first

  Two orders of operations, step for step, side by side - and what each one does to the conversation at the desk.

  Money

• Getting your own mechanic to look at it

  The procedure, in order, plus the exact request sheet to hand the shop.

  Buying

• How a transmission tells you it's failing

  Three stages of trouble, the symptoms that belong to each, and the honest limits of diagnosing any of it from a description.

  Condition

• How dealer auctions actually work

  Ninety seconds in the lane, a colored light, a spoken announcement, and a window to complain that closes fast.

  Buying

• How insurers price a used car

  The factors, sorted by how much of each one is actually yours to move.

  Owning

• How much to put down

  Three down payments on the same car, followed to their consequences. Illustrative arithmetic, checked to the cent.

  Money

• How service departments make money

  The book hour, the parts margin, the multi-point sheet - and the opposite incentive inside a dealer's own recon bay.

  Owning

• How to design a test drive route

  Seven legs, each built to make a specific fault show itself.

  Condition

• How to photograph a car

  Fifteen frames, in order - and what a buyer concludes from the one you left out.

  Selling

• How to read a used car listing

  One specimen listing, fourteen numbered callouts, and the question each phrase deserves.

  Buying

• How we decide what to fix

  Four questions, in order, applied to one car's punch list - and why the declined items are the informative ones.

  Condition

• Hybrid battery health

  Five things you can observe on a used hybrid without specialist tools — and the limits of every one of them.

  Condition

• Knowing when to sell

  Cost per month of keeping it against cost per month of replacing it - the only comparison that settles the question.

  Selling

• Liens, and how they clear

  Payoff, release, transfer - the sequence message by message, and the awkward middle where nobody is holding the title.

  Paperwork

• Maintenance that actually matters

  Ranked by the consequence of skipping it, from the items that end a car to the ones that only cost you comfort.

  Owning

• Meeting a buyer

  Seven phases, in order, for the part of a private sale everyone dreads.

  Selling

• Negative equity, drawn

  Two lines and the space between them. Why a car can be worth less than its loan for nearly four years, and what closes the gap.

  Money

• New Jersey inspection, what's checked

  System by system: what the state looks at, what it leaves alone, and why a sticker is not a condition report.

  Paperwork

• New vs used, three years in

  Thirty-six months of cash, side by side, with every assumption stated and one number left blank on purpose.

  Buying

• OEM, aftermarket, remanufactured

  Five ways to buy the same part, and a reference by part category for where each one belongs.

  Owning

• Paint depth and what it tells you

  Readings panel by panel, and why the spread matters more than the number.

  Condition

• Panel gaps and overspray

  Eight correct-versus-suspect pairs, described so you can find them in a parking lot.

  Condition

• Paying cash: what it actually saves

  The arithmetic on both sides of the beam, including the case against paying cash.

  Money

• Private sale or trade-in

  Scored across money, effort, time, risk and paperwork - including the cases where we lose.

  Selling

• Questions for a private seller

  Twelve questions, the exact words to say, and the answer that should end the conversation.

  Buying

• Reading a tire

  The sidewall, decoded — and why a wear pattern is a readout of the suspension, the alignment and the air pressure rather than of the tire.

  Condition

• Reading brake wear

  A cross-section, three stages of wear, and the four measurements that settle it.

  Condition

• Reading used engine oil

  Eight appearances on a dipstick, what each one indicates, and the honest limits of judging an engine by the color of its oil.

  Condition

• Records that hold value

  The folder, divider by divider: what goes in each, how to keep it usable, and what it is worth at sale.

  Owning

• Registering a car in New Jersey

  The sequence in order, and what to carry into each step - from the seller's signature to the plates on the car.

  Paperwork

• Replacing a car after a total loss

  Two clocks run at once. One belongs to the claim and one belongs to a decision you'll live with for years.

  Buying

• Rust, and where it actually matters

  Eleven underbody zones, rated cosmetic, watch or structural.

  Condition

• Salvage, rebuilt and flood titles

  Each brand, what it means, and what it does to value, insurability and everything that comes after.

  Paperwork

• Selling a car you still owe on

  The sequence, stage by stage - and the middle where nobody holds the title.

  Selling

• Shopping by price, not payment

  Two buyers, one car. The payment path and the price path, followed side by side to their different endings.

  Buying

• Spot delivery, and the call that comes after

  You sign, you drive it home, and the financing is not finished. A composite account of what happens next.

  Paperwork

• The arbitration clause

  The paragraph you signed on the way past, read slowly, phrase by phrase - and what it gives up.

  Paperwork

• The car we sent to auction

  It looked right in the lane. The paint gauge on the right quarter said otherwise, and the arithmetic said send it back.

  Condition

• The cars we don't buy

  Fifteen standing rejection criteria, each with its reason - and the exceptions, where there honestly are any.

  Condition

• The cold start

  Ninety seconds, watched window by window, with a stopwatch.

  Condition

• The cooling system, and why it kills engines

  A loop of water and a few dollars of parts decide whether an engine lasts. The diagram, then the chain of failure.

  Condition

• The documentary fee

  Six sides of one line on the buyer's order - and the $500 that can sit between two otherwise identical deals.

  Money

• The first phone call

  A specimen call about a used car, transcribed, with margin notes on what every line is doing.

  Buying

• The first thousand miles

  A used car tells you most of what it has to say in the first month. Here is what to do, and what to listen for, by the odometer.

  Owning

• The five-year number

  Five lines, five years, one used car. The payment turns out to be a little over half of it.

  Money

• The last twenty minutes

  Everything worth checking before you sign, as a countdown you can hold up on your phone.

  Paperwork

• The longer-term trick

  Two loans on the same car, two dollars apart in monthly payment, and $7,461 of daylight between them. All of it shown.

  Money

• The odometer statement

  Why the disclosure exists, what the three status boxes mean, and the evidence that argues with a number.

  Paperwork

• The title, explained

  Field by field across a certificate of title, and the four boxes that decide whether the sale can happen at all.

  Paperwork

• Timing belt or chain

  Two ways to keep a camshaft in step with a crankshaft, two entirely different failure modes — and how to find out which one your car has.

  Condition

• Used diesel: what's different

  Emissions hardware, fuel system and city driving — the three things that decide whether a used diesel was a good idea.

  Condition

• What a bill of sale must contain

  Every line, and the specific argument each one is there to prevent.

  Paperwork

• What a car smells like when something is wrong

  Ten odors, what each one usually is, and how fast it matters.

  Condition

• What a dealer actually makes on a used car

  The auction price, the pack, the floorplan interest and the three places the real money hides.

  Money

• What a lift shows you

  Nose to tail underneath a car, zone by zone, with what to ask in each.

  Condition

• What a warranty doesn't cover

  Seven categories of exclusion, what falls into each, and the reasoning that put it there.

  Owning

• What co-signing actually commits you to

  One sentence, taken apart phrase by phrase. Every part of it is doing work.

  Paperwork

• What each noise means

  Sound, then the causes it could be, then how fast you need to act — organized by when in the drive it happens.

  Condition

• What happens during a trade appraisal

  Forty minutes with a trade-in from the appraiser's side, and the four questions that produce the number.

  Selling

• What the history report misses

  Cash repairs, shops that don't report, the two years it sat. An inventory of absences — and what closes the gap.

  Condition

• What we get wrong

  Six real failures, what they cost the person on the other side, and the two we still haven't fixed.

  Buying

• What your credit score does to a payment

  The same car, financed six ways. Illustrative rate bands, real amortization, and the one figure the bands never touch.

  Money

• What your trade is actually worth

  Four valuation lenses on one car, four numbers, and why the gap between them is not anybody cheating you.

  Selling

• When a repair isn't worth it

  Not repair cost against the car's value - cost per remaining month against the alternative. Four worked cases.

  Owning

• When high mileage is fine

  Five mileage bands, and the one thing that governs whether the number matters inside each one.

  Buying

• Where you buy changes what you pay

  Franchise, independent, private party, online. The same car, four different deals - compared row by row.

  Buying

• Wholesale and retail are two prices

  Two markets, one car, the same afternoon. What the spread between them is actually buying.

  Money

• Why a price changes while it sits

  Two lines moving toward each other: what the car costs to hold, and what the market will still pay for it.

  Money

• Why small lots still exist

  What scale genuinely does better, and the five things it structurally can't.

  Buying

• Why we post the price

  Putting the number on the windshield costs us the most profitable conversation in the business. An argument for doing it anyway.

  Money

• Why your mileage doesn't match the sticker

  The lab and your Tuesday, side by side - and the four places a gallon of fuel actually goes.

  Owning

• Winter prep in New Jersey

  Brine, cold starts and short trips - the three things a Jersey winter actually does to a car, and what answers each.

  Owning

• Writing a listing that doesn't waste anyone's time

  Seven before-and-after rewrites, with the reasoning for every change.

  Selling