looking at a 65 coupe/What to look for?
3k? What kind of shape is it in?
If its a running, driving, nice looking car, its definitely worth 3000.
Look for rust on the floorpans - they have a tendency to disappear - also check the rear frame rails where the leafsprings attach, they do the same thing.
Just take a test drive and see how it runs, if its going to need a lot of work, etc.
3,000 is what a lot of people are paying for cars they're going to give a full resto, so getting a decent driveable car is worth it if you ask me.