For the sub-$1000 range, you can't pick a specific model. It's going to be totally dependent on the individual car and what kind of shape it's in.
For the record, I had an '82 Supra. I don't recommend one. Boatloads of torque, but it handled for crap (the rear end skittered around like it was wearing tap shoes) and it ate headgaskets like chewing gum. It was the worst-engineered thing I've worked on in many years. It was easier to actually change the engine than it was to get the head off. The transmission was stiff as a board any time the temperature went below 40 gegrees F. I drove it for most of a year with very little back brakes, because it was impossible to disassemble them without a cutting torch. Considering it had 4-wheel disks, that's outright pathetic. Changing pads on a set of disk brakes should be a 15-minute job. Coincidentally, I sold it for $500 because the tags/inspection were valid for another 18 months despite all its problems.
I'll second, however, the suggestion of a Fox-body Mustang. In addition to a cheap purchase cost, junkyards are awash in the things which means you can upgrade/repair them for peanuts if you don't mind spending time scouting the salvage yards.
are you kidding me $600? do you expect it to be running or like the supra in Fast and Furious that they had to rebuild completely??
