Patrick Mahomes trading cards sell for more than $300,000 at auction. -- Kansas City Chiefs quarterback Patrick Mahomes already has the record for the most expensive football card ever sold. This past weekend, the same kind of card with a different part of his jersey attached sold at auction for $280,600. In addition, the 2019 Mahomes Kaboom! "This was a landmark event for the entire sports-collecting hobby, bringing together extraordinary material from across generations and virtually every major collecting category," Chris Ivy, Heritage's director of sports auctions, said in a news release. "The record-setting auction total and more than 200 individual auction records reflect both the exceptional quality of the offerings and the remarkable passion and confidence of collectors around the world who see Heritage as their priority destination for top sports collectibles.". This material may not be published, broadcast, rewritten, or redistributed.*For the latest news, weather, sports, and streaming video, head to FOX 4 Kansas City WDAF-TV | News, Weather, Sports.