Hi TB community, I bought a bass on a whim while I was traveling in Cleveland at the Sam Ash there. It is a white G&L M2000 tribute bass, picked it up used for 400 bucks. Turns out the bass has no serial number on it. The folks at Sam Ash say the lack of the serial number is due to the fact that the bass is a prototype for G&L. I didn't care much at the time about the provenance because I never intended on selling the bass, and it plays great. However, I'm in a situation where I need to sell the bass now, and I'm having trouble determining what I have. Is this some rare prototype or did I buy some kind of frankenbass or what??? I need some help to legitimize what I have before I look like a complete ass in the used market.