Classic car or any car .... ???
If a classic then a 4 door A-body (some rust lowers the cost) or 4 door Aspen/Volare with a 5.9 magnum.
Something like this, offer 3k or 2800 cash ....
1969 Plymouth valiant ยท Signet
Or really beat the budget with this for 1400 ...
1973 Plymouth Valiant