I am thinking of setting a scene at an auction, but absent a gunfight and attempted theft of the item (which may happen!) I'm at a bit of a loss to make it interesting.
I remember a scene in a book with an auction (Tatooine Ghost maybe?) which I might have to re-read for inspiration.
Possibilities I have so far are:
Slicing the auction catalog to reduce the price of the item
Switching the item with a fake
Winning the bidding, THEN finding out it's a fake
Now I know there are some really creative people on these boards, so any more ideas?