20 Hidden Sources of Income Lying Around Your House

© Gerville / Getty Images/iStockphoto

Sports Memorabilia

If you collected baseball cards or sports jerseys as a child, you might be able to exchange these items for much-needed cash. Signed sports memorabilia, in particular, can be a big source of income.

“The more famous the player, the higher the prices demanded,” Denny said. For best results, consider having your items appraised to determine how valuable they are.

You can find an appraiser through Appraisers.org or have trading cards professionally authenticated through the Professional Sports Authentication at PSACard.com. One of the best places to sell sports memorabilia is eBay, which many sports enthusiasts use to find collectibles.