hmmm.....I actually spent a few minutes considering whether to send you an email offering to buy it myself.
But, since I am currently bidding on real shotguns, I guess I should save my pennies.
That being said, there is an internet auction site for airguns: http://www.bbairguns.com/cgi-bin/main.pl
Also, I would try listing on gunbroker as well: http://www.gunbroker.com/
It might sell better than you think. Good luck.