Down in the Classifieds section we have a Wanted to buy forum. That is where this is being moved. You might also search through the Gear for sale forum and see if anybody is selling a Thumb.
Yes, my band's soundman has a thumb bolt on 4 string he
wants to sell. It probably has about 10 hours of playing
time on it. He had a wild idea that he wanted to learn how
to play bass but became bored with it and lost interest.
I checked out the bass last week, it's flawless. He wants
$1200 for it. It's like new with the gig bag, tools, wax, etc.
It's a fretted 4 string.
I have a 1990 Warwick Thumb 5 NT FL for sale. The price is $1800 and doesn't include shipping and handling. It is in immaculate condition, and comes with a Warwick Hard Case.