Lot 13

What is the mystery surrounding LOT 13, why would someone go out of their way to bid for something at an auction then days later sell it at a considerable loss? Samantha is determined to find out, but the deeper she digs the more confused she becomes; she's been dealt a hand she doesn't know how to play. Is the man she thinks is behind it all a conman out to fleece a vulnerable old woman, or has Samantha got it all wrong?