I bought mine for $3900. Paint was in pretty good shape, slightly faded from 88, but no major probs at all. Had 101,000 when I got it, and ran really good. It also had an absolutely perfect interior, except the lower speaker covers were gone from when the car got broken into and the stereo stolen. Soon after I got it I had to replace the injectors which were leaking, a coolant hose burst 2 days after i bought it, and the heater core went about 4 months in, then again about 8 months later. Water pump went too around the first heater core, and just recently the radiator went bad. The alternator also went a while back. the way I figure it around 100,000 miles stuff is gonna go, because most of them are still stock parts. Expect to fix it, and you will have no complaints. I have really never had a drivability problem that wasnt caused by me trying to fix something else. Of course the usual vaccum leaks and whatnot, but no big deal once you just take a couple days and really trace stuff.
Prices will seriously vary, if you are in the middle of the country you can get an incredible deal, but on the outskirts prices go up. Look for oil leaks, and other fluid leaks, make sure the tranny shifts well, and check the paint over REAL good so you can see if its been in a wreck.