Palms Legend 10th issue slot card (4/30/09 expiration date) that is one of only four known error prints. The front design was printed on both the front and back of the partially clear card without the back text ever printed. It's on eBay now and ends next weekend.

Here's a link to the eBay auction
http://www.ebay.com/itm/RARE-Palms-Legend-ERROR-PRINT-10th-issue-Slot-Card-Exp-04-30-09-/301126129104?pt=LH_DefaultDomain_0&hash=item461c8415d0