I didn't think ebay worked that way. If the current bid is $10, and you bid $100. The bid that is registered is $11.00 (or whatever the minimum increment is). Then when someone else bids $12, your bid of $100 trumps it at $13, and so on untill someone actually bids over you at $101.

I don't see how the bluf bid would ever register... Ok. It would work, but only if the scamming bidder had one legit and two fake overbids.