I love watching older, rarer GU sales and dreaming about owning that rare item, like a pre-war patch. Chris Levy posted an awesome article on the front page about rare GU - http://www.freedomcardboard.com/?p=1382. Of course one of the problems with rare GU, if you want to own it that is, is of course the fact, that it is rare.
So that being said, post one of your own personal favorite rare GU cards, or, a link to an ebay auction of a rare GU card - I'll start, here are three I found last night, all from '08 Prime Cuts
Satchel Paige Patch - [phil:ckmbj9v4]220768972471[/phil:ckmbj9v4]
Jim Thorpe Jumbo - [phil:ckmbj9v4]370501664835[/phil:ckmbj9v4]
Gehrig/Robinson/Thorpe/Jackson Quad - [phil:ckmbj9v4]220770033588[/phil:ckmbj9v4]