I see this sort of sale more often than I'd like:
http://www.ebay.com/itm/1952-topps-D...item4cfa33b433
I made an offer and was instantly rejected. So I made another, and another, and got the same response. Finally I undercut his price by just $10, and was still immediately rejected! So I thought I'd ask him why he chose to list the card this way. But he's not receiving questions right now...
And if you're wondering why I was so idiotic as to bid to within $10 of the BIN price, I really "knew" at that point, having been rejected on so many lower, but still reasonable bids, that this one wasn't going to meet his standard either.
The conclusion on this one is that an offer of a very few bucks less than the $900 BIN will meet the standard, but nothing else will. Now why would the card be listed this way?