call and run the serial, someone got jacked on ebay for selling LP supreme copies that were 100% legit looking. i called gibson and ran the serial number and he said it was off of an SG in 1998, so if i were you id call and run the serial number.
Shame you cant make out the serial number but yep it looks the real deal!

You could haggle him down to $350 probs, my bet is hes a crack addict.