Anyone know where you can go to trade/sell gift cards you can't use?

I have two $25 National Amusement Theatres gift cards. The more popular sites don't buy these cards. There are no locations close to my house. Lots of locations in states below. If anyone is intersted I'll sell below face value. Website is www.nationalamusements.com

Connecticut
Massachusetts
New Jersey
New York
Ohio
Rhode Island