Well, as long I am from the side of those who do not write, but buy programs and then try to make some money out of it, I can not advise anything really smart.
Are there many difficulties to open accounts for bidders, and each time people clic on their link the amount of the bid is deducted, until it's 0,00, then they go to the very bottom just above those who did not pay at all. It could be more fair placement than the alphabeticall one, no?
+ about the implementation, not to mention big guys like Go.com, which would not be fair, but even Links other main competitor is offering this, it means it can be done.

Regards,

Slava.