There was a recall on those. Go to the Springfield website to check serial numbers. If your pistol was upgraded there will be a roll pin in the grip safety.
For current prices go on gunbroker and do an advanced search of completed auction where the item sold. Narrow your search by caliber, barrel length ect. 357s are doing very well, 45s not so much.
I think there is some misunderstanding about how Gunbroker auctions work. Any bid in the lat 15 minutes adds 15 minutes to the auction. eBay does not do this and thus you have sniping on eBay. If you bid a Gunbrker auction with one minute left it will reset to 15 minutes this will continue with each additional bid. It will also send you an email telling you you have been outbid so you have time to decide if you want to increase your bid or let it go.