If you're thinking of giving gift cards this graduation season, don't forget to check out Plastic Jungle, an online gift card exchange.

You can get cards for popular places like H&M, Olive Garden and AMC movie theaters for up to 30 percent off. 

On the flip side, if you have received gift cards you won't use, you can go to Plastic Jungle to sell them. They pay up to 92 percent of the unused balance.

To get started, go to www.plasticjungle.com.