I bought my C50 on ebay about 8 or 9 years ago - paid about 250 USD for it, incl hardshell case. It's condition was(and is) exceptional. I've also found very little about this guitar. I don't have the serial number handy. It is on the original label under the soundhole. I think the fellow I bought it from said it was from the eighties and made in Japan. iwould like to have a copy of the material from Gibson.
maybe we should all post pics of this little jewel?