Why don't you use the gift certificate for something you could use? Companies like Briley donate these items to shoots to promote the game. Selling them at half the value is a slap in the face to our sponsors that promote the events.
I am selling for my little brother who did win this. Problem is, he shoots Pure Gold chokes. He did try to buy and gun case and range bag from Briley, but found out the cert isn't good on those items (fine print on the back of the cert). It actually was the salesman's suggestion to try to sell instead of just buying a choke that he isn't going to use.