5. Sell, donate, or invest unwanted gift cards. In addition to re-gifting or using the gift card themselves, consumers have a few other options. Websites like GiftCardGranny.com, PlasticJungle.com, and CardPool.com offer a secondary market where consumers can sell unwanted gift cards for a percentage of the card's face value. For the philanthropically-minded, Pavini recommends GiftCardGiver.com, which sends gift cards to nonprofits. (Some organizations also accept direct donations of gift cards, which may be tax deductible.) Investment website GoalMine.com is offering a gift card trade-in program through the end of January where new users can trade in gift cards for 150% of the value of the first gift card to fund investment accounts.