You cannot specify an artificial minimum on this auction. You must complete the transaction no matter the bid price as stated in the terms. Thanks for understanding!
If there's a 'glitch' you should take it up with Listia. Once a bid is made, one cannot change the terms or the legth of the auction. I had a 'glitch' where I failed to put the starting bid. However, Listia said Under the trem of its use, I was committed to accept whatever the final bid was. Refusing to do so could get a user suspended from the site.