This is pretty neat. On the last unique auction for a $10,000 credit card, all of the revenue was donated to "Blessings in a Backpack". The following was copied from the website.

VISA debit card $10.000 Charity Auction

Part of our mission statement is to support worthwhile Charities around the world. The focus is on supporting children in need. In this light we are featuring our second Charity Auction to benefit 'Blessings in a Backpack'. This program feeds children in grades K-5 in Title 1 public schools; who qualify for the Federal Free and Reduced Meal Program and who may not have any or enough food on the weekends. 'Blessings in a Backpack' is currently feeding over 10,000 children in Kentucky, Indiana, Florida, Michigan, Missouri, California and New York in public schools. It only takes $80 to feed a child for an entire school year. The Program works like this: a school is chosen and a local grocer partners with the program to provide food for meals in the backpacks. Every Friday, students receive their backpacks with food that requires little or no preparation. They return with their backpacks on Monday ready to learn.The person who is awarded this charity auction, will personally receive a $10,000 Visa debit card to use as they wish. All of the revenue from the auction will be donated to 'Blessings in a Backpack'.