I bought a 91 Nissan 300zx 2+2 on Ebay for 6500 with 77k miles on it...
turns out, the odometer didn't work whenever it didn't feel like working...so i'm thinking my car has about 100k miles... had to buy a new odometer for $50
The car didn't have 60k service done, so i had to shell out 800 bucks to replace the timing belt, water pump, accesory belts, fuel pump, tranny fluid, etc...
But you gotta be ready to shell out some money to get the car fixed after you buy it so it wasn't too bad...