Cool guitar! Very interesting Omega, more like a U shape. These don't come up very often on eBay, and a couple that have appeared lately have been listed for crazy money, $6-7K, and not drawing any bids. Assuming the electronics all work with no problems, a realistic price to expect is in the $2500-$3500 range, perhaps if there's a bidding war up to $4K. Good luck with the sale. The more high quality pics in the listing the better.
Bill, the guitar one