Most expensive used car problems leave evidence. A structured inspection catches the majority, and the whole thing takes half an hour.
Before viewing
Check the vehicle history – outstanding finance, write-off record, stolen status, mileage history. This is cheap and it is the single most valuable check.
Compare the advertised mileage against previous service and inspection records.
Outside
Look along the body panels from an angle for ripples or colour differences, which indicate repair. Check panel gaps are even.
Tyres: tread depth, uneven wear which suggests alignment or suspension issues, and the date code which reveals age.
Look under for rust on structural areas and for fresh oil.
Inside
Wear on the pedals, steering wheel and seat should match the claimed mileage. A worn interior with low mileage is a warning.
Test everything electrical. Every window, every light, the air conditioning, the heated seats. These are individually cheap and collectively expensive.
Check for damp smell and lift the boot carpet, since water ingress is common and awkward.
Cold start
Insist on starting it from cold. A warm engine when you arrive can hide starting problems, and this is a common seller tactic.
Listen for knocking, watch the exhaust for smoke, check no warning lights remain lit.
Driving
Brakes without pulling or vibration. Gearchanges smooth. No unusual noises over bumps or on turns. Steering straight without correction.
The best money spent
An independent inspection by a mechanic. Costs a fraction of one repair and has saved a great many buyers from a bad purchase.