Look around on eBay for past Omnikey auctions, you'll see they often go for well over $100 and rarely do you see this old blue alps version. The guy from Northgate Keyboard Repair (Bob) had ~5 that he sold for $225 plus shipping IIRC and they're long gone.
Blue Alps are the new hype, if I were you I would just throw this on ebay and buy a korean custom and some matias switches with the proceeds