Yes. I am doing one of these as well ^^ I am holding a 'your character here' auction! :D There will be two spots: The pred position, and the prey position.

Rules:
Character MUST be male.
Any species is welcome.
Auction end time: July 14th at 12:00 AM E.S.T.
Last bid accepted 15 minutes prior to auction close to help prevent sniping.
Payment due in full within TWO DAYS of auction end.
Opening bid is: $10, with minimum increment of $5.
To place bids, please reply to previous bidder.
Winner will be notified at the end of auction.
Questions? Feel free to ask. Happy bidding!

Example: http://www.furaffinity.net/view/10446844/