I was lucky enough to purchase a large group of Christensen marbles and the Guinea was among the lot, it also had 12 mint Christensen Bricks which I listed in a lot together, I put a minimum reserve of $700 on them and I had two bidders to bid ridiculous amounts just so they could reveal my reserve then cancel their bids... I am going with my own opinion and with my two colleagues and stand by this marble.
id retraction and cancellation history
Everyone can see that a bid has been retracted, but only you and the bidder can see the explanation
Bidder
Action
Date of Bid and Retraction
the2nortons( 4622)
Retracted: US $48,999.00 Explanation: Entered wrong amount
Bid: Mar-25-16 17:45:26 PDT Retracted: Mar-25-16 17:48:26 PDT
psia-antique( 1476)
Retracted: US $2,117.17 Explanation: Entered wrong amount
Bid: Mar-22-16 13:51:11 PDT Retracted: Mar-22-16 13:57:54 PDT