Club Nintendo Europe gets Mario Kart Trophies, Foam Cut-Outs
For 5000 stars (or as much as you're willing to pay on eBay) one of these could be yours. These are actually miniature versions of the trophies being handed out in the Nintendo Mario Kart 7 Tournaments running across Europe. Also, they aren't actually made of gold, just so you know.
The foam character cut-outs are very large and easily stick on the wall. You get three per set for 4500 stars each. Seeing how the trophies are only 500 more stars, it seems like a no-brainer.