MIAMI (CBSMiami) – Americans will spend an estimated $200 billion in gift cards this year, according to Coresight Research. But a big chunk of that money goes to waste.

Valerie Guerrero likes receiving them, but she admits it’s not always a memorable experience and she sometimes forgets to use them.

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“It’s awful. I tuck them away and then it’s like out of sight, out of mind,” Guerrero said.

It’s a common problem. A new survey from Bankrate finds 51% of U.S. adults have unused gift cards, vouchers, or store credits. The average person is sitting on $116, and many times the money is never spent. Bankrate.com said 73% of those with unused gift cards, vouchers, or credits have been holding on to them for a year or more.

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“Half of us have lost value at some point, either because we lost the card, or it expired, or maybe the business went out of business before we had a chance to use it,” said Ted Rossman with Bankrate.com.

Experts say there’s no reason to let the value on a gift card go to waste. There are plenty of websites that will offer cash for them. Raise, CardCash, and GiftCash allow you to sell the card and receive around 80-90% of the value. Another option: Give the card to someone else, even if there’s a small remainder left.

“You can often add additional value to it. You know, you might not give your brother let’s say the $4.17 Home Depot card that you have lying around, but if you can round it up to 25 bucks or 50 bucks,” Rossman said.

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Rossman said it’s a good idea to use the cards and other credits quickly. It’s important to remember the cards only become a gift when you use them.