I'm a relative noob to the classics myself, but have learned a LOT from the guys on this forum, you picked a good one.
I can say i paid 3700 for my 68 lemans convertible. The avatar is the car as i bought it. It had severe rust issues in the rear quarter panels and has been (basically) a frame on restoration project. You have the right idea looking for a rustless car, i wish you the best of luck finding one. as for price, my brother in law's father who's restored numerous cars told me "if you pay now what the car cost new and it runs and drives, you got a good deal"