We spent 60 hours using and researching gift card exchange websites to figure out which ones give you the largest return on investment along with the best selection and easy-to-use extras. If selling your unused and unwanted gift cards online sounds a little sketchy, don’t worry: we also scoured the Better Business Bureau website to see which services have had consumer-reported complaints. It didn’t fare the best in our selection test, but Cardpool is the best gift card exchange out there because you’re guaranteed a return of up to 92 percent when you sell your cards in person or online. It has an A+ from the BBB and an app for shopping or selling on the go. The website is also very easy to use, offers you a ton of payout options and doesn’t charge any extraneous fees, making it our best overall pick.