>>>Now if they "snipe" the auction & win it, I don't know what you can do short of contacting

If it is stated clearly in the auction that bids will not be accepted from those with zero feedback (I've seen it less than 5 etc)... then the seller is not obligated to sell the item to a non-qualifier who wins the auction.

He can make a second chance offering to another bidder or re-list the item.