Owner decides gender and can make changes as he or she sees fit
This guy has a piece of art to go with him but I think the design is slightly different in the first picture:
http://www.furaffinity.net/view/17390710/

Reply to my comment to claim
Bidding starts at 1$ USD
Auction ends 24 hours after last bid
Reply to the highest bidder to out bid them to make it easy to keep track of please