This one has been advertised for awhile...in Connecticut.
http://albany.craigslist.org/cto/3930567179.html
They normally rotted in the lower quarter just aft the rear wheels..drainage wasn't the best back there...also check lower fenders and door drain areas. My college roommate had 2, great cars and stupid fast...they are around for your price range albeit harder to find as they get older. You could get a ttype for that price too, if you wanted to widen your search pool. Obv the newest ones (86-87) are the ones to get b/c of the intercooler.