Posted By:
MattIt sounds like you didn't do so in your case, but bidding on another instance of a card with no intent of owning it for the sole purpose of pushing up the sale price, smacks of shill bidding. The difference between the two is that instead of taking the profits from the current sale, you'll get the profits when you sell yours.
I'm sure it happens all the time and many have no issue with it, but it always smelled funny to me.
My Trade/Sale Page