I have a 74 P-Bass that I bought about 10 years ago. I've never thought much about it's value until now, and am just curious about what opinions are out there. A previous owner installed a J-Bass pickup at the bridge, and did not do a very good job of it. It's too close to the bridge, and the woodwork to get it in is terrible. I'm also not sure if it's wired correctly; when you turn up the volume of the J-pup, the overall volume of the bass diminishes slightly. Finally, he had removed the frets, so I bought a '77 maple fretboard neck and installed it. It has never had any work done to it, so I'm sure the frets, etc., need attention. I'm considering having a pro tear into it and overhaul it. However, I've always wanted a Jazz bass, so I'm considering the cost of overhauling what I have vs. just buying a MIM Jazz bass, especially if the value of the P-bass has been ruined by all the mods and such. Any thoughts out there?