Does anyone know how I can "swap" gift cards to be used for different stores?

[Mr Snarp Snarps]

In other words I have a Cinemark gift card and I want to change it to Amazon (or something like Amazon, it dosen't matter. Just not Cinemark) Could anyone enlighten me?

 

[62t]

www.plasticjungle.com

you could also sell it, but not going to get full value.

 

[SaraAB]

I have used plasticjungle, and they are good. I have also used a number of other gift card selling sites, and every one I used has worked as promised.