The bad news is that most of those old football cards you've saved for decades aren't worth much. Scan the "sold" listings on eBay , for example, and you'll find entire collections that sold ...

Common baseball, basketball, and football cards are generally worth a few pennies each. Cards from the Hall of Famers and household names hold more value, of course.

This Ronaldo card was a one-of-a-kind item and could be sold for up to £12,000 Credit: The Sun. As an avid football fan, I've often considered delving into trading cards.

The sports trading cards you collected and tucked away could be worth a lot of money after a resurgence in their value. The cards do not have to be that old, as a LeBron James rookie card recently ...