Edit: Nevermind. Someone explained it to me.I just check to see if anyone has bid on the item. If they have then you know it will sell for the current bid at least. Unless you're bidding on the item there is no way, to my knowledge, of knowing what it sold for.
What does your first sentence mean? I have never seen an item on the AH with no bid.
Afaik, unless you're bidding on or selling the item, there's no way to tell if the current bid is actually a bid or just the minimum bid. Since I see references to checking the AH so much here, there must be something I'm missing.