GoodGameMedia will let you do so -- while also supporting an incredibly worthy cause. All of the money you spend on these items will be split between Child's Play and the Brian Wood Memorial Trust, a fund to help support the family of the Company of Heroes lead developer who died in an unimaginably tragic car accident earlier this year.
Go check out the 30 pieces of biddable memorabilia on the vendor's eBay hub. Some of those would make pretty wonderful (and karmically positive) gifts for the upcoming holidays, don'tchaknow.
[Thanks to everyone who sent this in!]