Got mine off Kapow for around £30 recently when they had a re-stock. Depends on where you are. I'd imagine he's cheaper in the US simply because he got a mass release over there but not over here, where we've had to pay through the nose for him. Are you selling or buying?
In that case then it's as much as someone is prepared to pay. Once an item is not avaialble at retail any more, then it's a shot in the dark. Look at eBay!