A local framebuilder (the guy who builds the frames also works at Yellow Jersey on State St for you locals) is donating a custom-built fixed gear frame for The Big Fix (a fundraiser for a type of cancer called Langerhan’s Cell Histiocytosis) to raffle off - $20.05 for a 1/150 chance. As of today, there were 128 tickets sold (129 when I buy mine in a few minutes). It's not rational, since 1/150th of the $1350 it costs to order a frame is only $9.00, but (1) it's for a good cause and (2) it would be years before I could actually afford to have a custom frame built.
One of my favorite parts is that you don't just get the frame, you get pictures of the entire process of its construction. Here's a sample, from concept sketches to the final product -