that greame kellow or wutevers supra? yeah it sounds like a good deal if its in good condition... if i had a little bit more money id check it out myself, but 10K is just too much to spend on another car.
uhmm.. the stock BOV is usually toast by now, no big deal like a 50 dollar fix, check the brakes, check for rust, check for all the usual stuff, but definetaly check for coolant in the oil, yank the dip stick and take a look. look around the oil cap, is there white looking crusty stuff there? does the coolant light come on inside the car (its the furthest left dummy light, left of the tach and rpm gauge)
if you can, check the car out first thing in the morning, or when it hasnt been started yet. listen for a knock in the engine.
also if the engines been changed, make sure its a 89+ engine, im not really sure how to tell the differences by just looking at it, but its unlikely it wouldnt be since the engine mounts are different in 89+ supras.
hrmm, thats about all i can think of, theres a tip on
www.supras.com under "SOGi" about buying a new supra. you might want to check that out.
g'luck man