Your auction ends. You email the highest bidder: "You did not meet the reserve price. However, I am willing to sell for your high bid plus shipping. Would you like to complete the transaction?" Bidder replies affirmatively. Bidder receives no response, and sees you relisted it on an auction site and sold it.
Yeah, you're not really supposed to do that.
http://en.wikipedia.org/wiki/Offer_and_acceptance
Yeah, you're not really supposed to do that.
http://en.wikipedia.org/wiki/Offer_and_acceptance