You found a 2017 Honda Civic with 78,000 miles on Facebook Marketplace for $13,500. The photos look good. The seller has had it for 4 years. You are going to look at it Saturday morning.

What separates a great deal from a very expensive mistake is the next 15 minutes. No tools required. You do not need to be a mechanic. You just need to know what to look at.

Before You Show Up: 5 Minutes on Your Phone

  • Run the VIN through NHTSA for recalls: nhtsa.gov/recalls. Free. Tells you if the car has open recalls the seller never addressed.
  • Check Kelley Blue Book and Edmunds: kbb.com and edmunds.com. Enter year, trim, mileage, condition. If the asking price is $2,000+ above "private party" value, you have leverage.
  • Search the make/model + "common problems": Every car has known issues. A 2017 Civic might have AC condenser issues. A 2015 F-150 might have cam phaser problems. Know what you are looking for before you arrive.
  • Check the seller's profile: How long on Marketplace/Craigslist? Multiple cars for sale at once? That is a flipper, not a private owner. Flippers are not illegal, but pricing is usually marked up.
  • Look at the title state: Clean, Salvage, Rebuilt, Flood. If they hide the title status until you show up, walk away.

The 15-Minute Physical Inspection

Minute 1–3: Walk Around the Outside

  • Paint: Look down the sides of the car in sunlight. Any panel that reflects light differently has been repainted. Could be a minor ding. Could be a front-end collision. Ask.
  • Panel gaps: The gap between the hood and fender should match the gap on the other side. If the driver-side gap is wide and the passenger-side is tight, the car has been in a front-end crash.
  • Tires: Uneven wear = alignment, suspension, or frame issue. All four tires different brands = owner cheaped out on replacement. DOT codes on sidewall show tire age — anything over 6 years is hardening and risky.
  • Glass: Windshield replaced? Date stamp shows when. Newer than the car's age = someone broke it. Not a dealbreaker, but worth asking.
  • Rust: Bottom of doors, wheel wells, rear of rocker panels. Surface rust is cosmetic. Bubbling paint from underneath = rot. In salt-belt states (Northeast, Midwest), check under the car for frame rust — Google the model to know where the rust-prone spots are.

Minute 4–6: Under the Hood (Engine OFF and COLD)

  • Oil dipstick: Pull it out. Fresh clean oil = recent change. Milky/foamy = coolant in oil = head gasket = walk away. Black but liquid = overdue but not disaster.
  • Coolant reservoir: Should be clear green, pink, orange, or blue depending on type. Brown or rusty = neglect. Oil floating on top = head gasket = walk away.
  • Oil cap (underside): Pull it off. Chocolate milk texture = coolant in oil = walk away. Clean oil or slight residue = fine.
  • Hoses and belts: Belts with visible cracks, or hoses that are rock hard or ballooning = imminent failure.
  • Leaks: Look for fresh wet spots on the engine or under the car. Small oil seep = most older cars have this. Active drip = bigger problem.

Minute 7–9: Start It and Listen

  • Cold start: Ask the seller NOT to start the car before you arrive. A cold start reveals issues a warm engine hides.
  • First 10 seconds: Any blue smoke = oil burning (bad rings, worn valve seals). White smoke past 30 seconds = coolant burning (head gasket). Black smoke = fuel mixture problem.
  • Idle: Should be steady. Up-and-down idle = vacuum leak, bad sensor, carbon buildup.
  • Noises: Ticking = possible valve adjustment or lifter. Squealing = belt. Knocking = engine internals — walk away.
  • Warning lights: Any lights that stay on after start? Check engine, ABS, airbag — all matter. If the seller claims they "just need to be reset," they almost never do.

Minute 10–13: The Test Drive

  • Smooth, low-traffic road: Accelerate hard from 20 mph. Should pull strong without hesitation. Stumbling, bucking = transmission or engine issue.
  • Highway, if possible: At 65 mph, let go of the wheel briefly (safe empty road). Car should track straight. Pulling = alignment or suspension.
  • Brakes: Firm, gentle stops. Then one harder stop from 40 mph. Any vibration in the wheel or pedal = warped rotors. Grinding = worn pads metal-on-metal.
  • Transmission: Shifts should be smooth. Hard clunks, delays, or slipping = expensive transmission service or full replacement.
  • AC and heat: Both, for a full minute each. Weak AC = possible condenser, compressor, or leak. Cold AC that quits = electrical.

Minute 14–15: Documents

  • Title: Clean? Seller's name matches ID? Current state? Do not buy a car with a title in someone else's name unless you understand exactly why.
  • Service records: Any records at all is a green flag. Ask: oil changes, timing belt/chain if due, transmission service, major repairs. Honest owner = has receipts.
  • Registration status: Tag current? Inspection sticker current in inspection states? Expired = owner may have been hiding from something.

When to Walk Away

If you see ANY of these, walk:

  • Title does not match seller's ID
  • Branded title (salvage, rebuilt, flood) and it was not disclosed
  • Milky oil cap or radiator
  • Frame rust
  • Knocking noise from engine
  • Warning lights the seller "cleared before you arrived"
  • Car was already warm when you arrived (they hid a cold-start issue)
  • Seller refuses to let you take it to a mechanic for a paid pre-purchase inspection

The $150 That Saves $3,000

If the car passes the 15-minute inspection, and you are seriously interested, take it to an independent mechanic for a pre-purchase inspection. In most American cities this costs $100–$200 and takes about an hour. The mechanic will put it on a lift, check for leaks, measure brake pad thickness, test battery and alternator, and scan for pending codes.

Any seller who refuses a PPI has something to hide. Do not argue, just walk.

Sources & Further Reading

  • NHTSA — VIN-based recall search (free, official)
  • Kelley Blue Book — Private Party Value pricing — kbb.com
  • Edmunds — True Market Value methodology — edmunds.com
  • Carfax — vehicle history reports and known data limitations — carfax.com
  • AAA Pre-Purchase Inspection (PPI) — program and average cost data (0–0 in most US markets)
  • FTC Used Car Buyers Guide — "Buyers Guide" sticker requirement on dealer-sold used cars

Why We Care

My Mekavo is free for American car owners. Once you buy the car, log every service, every receipt, every mileage. When you sell it someday, you will be the owner with the documented history — and you will get $2,000 more than the ones who shrug.