that's not a gibson, that's a galveston (also went by the name "tennessee", it has 15 strings, not 18 (dude doesn't even know how to count), and it cost about 500 bucks new, give or take. and was worth even less, from what i've heard of them, although i have never played one so i don't know. the pic he has posted is even the pic from the ebay ad for these things, when they've been posted.
here's a thread about them :
15 string bass alert!
this is a major scam.
