My local mom & pop store has a 1975 Jazz Bass. It definitely shows its age. Natural body, maple board with white blocks (like Marcus Miller). The lacquer is nice and brown, and the body has lots of worn spots. Some idiot replaced the stock pups with EMG's, and the bridge is an aftermarket brass model. The tuners and control plate & pots appear to be original. The frets show some wear, but are usable. The neck is straight, and has 4 bolts rather than 3. The store owner claims the bass is a 1975 based on the serial number on the neck plate. I looked at the heel of the neck and didn't see a date, just a number. I didn't write it down. He was asking $2000. I offered $1600. He countered with $1800. Should I go for it? If I fixed it up, could I make any money? I've never dealt with any true vintage Fenders, so this is new territory for me.