You could also pay an FFL to ship it for you. May cost a little more (some FFL's won't accept from a private individual), but all you do is drop it off and hand over some cash.
When I shop on GB I look for deals and skip over the high starts or fixed pricing. I watch the items I am interested in until they reach a price I am unwilling to pay. If I were to sell I would want to get prople invested in the auction. Start by getting the watchers. Turn them into bidders, and get more action on the listing.