Hello everyone, first time posting on here so forgive me if I am in the wrong area. I am looking at a Gibson RB-500, serial number stamped on the back of the peg head is, 348163. I believe it is a 1965 but not sure. I would like to know how many of these were built, who made the parts for them, ie: tone rings, flanges, wood rim etc. and a price range. On a scale of 1to10, 10 being mint condition I would give this banjo about a 7.5. The finish is good, the gold plating is good but the original tuners have been replaced with Schaller. The owner has the original tuners. Any help would be greatly appreciated.