Man, if I were you wouldn't buy any MKIII over $5,000 with the year under 1990 with at least 120 miles on it and with head gasket problems. That Supra will have a gasket blown up soon.
I would buy a 1991 Supra for $5,000 if it's under 100,000 miles. Have a metal head gasket, car in great condition, new tires, rims, and the engine looks like it has been kept clean.
My Supra is working fine for me but I'm having some rust on it, some engine problem even though my new metal head gasket has been replace at 120 k miles and now the car has 173,000 k miles on it now.
I'm planning to fixed the rusted parts. Buy a new engine, buy bodykits, rims, tires, and paint the car all white even though my car is white. I want my car to shine like brand new again