Honestly with the price of restores and the time they take if you have to find a base game, buy the needed parts, etc you are usually in it for 4-5K for most of the better games. I think $4500 is a pretty fair price for a NIB QS, SG, or SW and I think they would sell a decent amount of them but not a ton. They probably wouldn't lose a lot of sales at the pro price of $5200. But I do think it would be a very limited marked and I'd be surprised to see more then a few hundred sell.