Hi guys,
As previously posted I'm looking for a new used motor. After doing lots of research and knowing what I know this is what I'll be looking for when I go to purchase. I though this may be handy for people and of course if anybody has got anything else they do or want to add.....go for it.

Exterior:
Walk round - open all doors (open from inside also), look for rust everywhere on bodywork and around wheel arches, look for body seems to match up (anywhere the seems vary in thickness could be a bad sign), measure wheel to arch and compare to other side, paint overspray (sign of body work following collision), sunroof dents/dimple (poss. big collision), look at the struts and springs...any leaks from shocks, bounce the front and rear...any noise.
Tyres: Wear over whole width, cracking, run hand over, same axel/same type, sizes are same, wheel lock-nut key
Interior: boot tools, spare tyre (check tread), leaks in boot/interior, records/receipts (especially for CAMBELT if needed), radio code, smell for damp, everything works (inc. fold down seats), move seats, move all seat functions, everything electrical works, CHECK ENGINE/WARNING LIGHTS, check heater!
Under bonnet: oil leaks, belts, batt, ALL fluids, spin cooling fan. N.B. if brake fluid low could also indicate the pads are low and may need changing.
Run the car... allow to idle for a while, make sure of smooth idle.
Exhaust smoke on start up. blue smoke very bad! exhaust pressure with rag.
Test drive: start up/idle, cranking enthusiastic and quick? note for any dash/check engine lights, floor it, kickdown - listen to and feel shifts, look for misses, temp gauge climbs nicely and settles half way, hands off steering wheel - no pulling to one side, no vibrations, steering wheel straight, brake vibrations, braking to one side, engine noise, brake hard, lock to lock - suspension noises/clicking/rubbing, how does steering feel, suspension noises on pot holes
finally do a Car text check on 83600

hope this helps as this is what i'll be doing. feel free to add more

(looking over my mates new car took us 2 hours in total.... no hiding
