Sometimes sellers accidentally select "Buy It Now" when they meant to specify a starting price. Sometimes they'll eat the loss for goodwill, but probably not very often on a gold coin. Scan for completed double-eagle auctions, sorted by lowest price, and there'll usually be at least one for 99 cents. Sometimes sellers list a coin for well under melt (or, more commonly, just a bit under melt), and it's a scam. I've bought those occasionally; most often, it becomes a matter for Buyer Protection, which has always come through. Sometimes sellers list a coin under melt and then do follow through. I've bought a couple of those, too. They don't come along very often, though, and when they do, you don't have long to pounce on them.
