Custom action figures
A while ago, Wired ran an article on action figure modding. It's an interesting concept but I wasn't blown away by any of the examples in their gallery (except the seriously awesome Skeletor shown above). Then I saw Jin Saotome's Master Chief on Kotaku. I was so impressed by the incredible level of detail on this 8-inch figure, I'd be proud to own it, even though I don't play Halo.
I would love to have a modder selling these at a Craftstravaganza, except the price would probably have to be somewhere on the scale of a customized Blythe doll. Master Chief is on eBay and bidding is already over $300 with four and a half days to go!