It pays to review your auction listing, if not when you are posting an item on eBay, then very soon thereafter (like within an hour) to make sure what you posted is correct. I've made bloopers like listing "Las Vegas CA" and showing the wrong photo for a chip, and once I think, a wrong price as you did. Once a bid comes through, you have to "cancel early" or explain to the prospective buyer (as you did). Nothing wrong with that but it may leave a "sour taste" with the prospective buyer. Having said that, any reasonable bidder ought to realize, too, that he is bidding waaaayy too little for a valuable item and something may be "wrong" with the auction.