Need advice on selling or trading digital movie codes

I just need to know where to start with that in this forum, I have been a member for a bit now but I really havent established myself amongst the community, in any case, I did a dumpster dive at a video store the other day and found 2 Digital download codes for the movie "FROZEN", I also found some codes for the xbox 360 for YAIBA Ninja Gaiden Z, I was wondering where you go to trade/sell them here, or if anyone would be interested in them. Thanks.

Xbox 360: http://www.cheapassgamer.com/topic/248120-official-xbox-marketplace-trade-thread-free-items-no-longer-banned-update-21114/

DVD/Blu: http://www.cheapassgamer.com/topic/279395-dvdblu-digital-ultraviolet-code-trade-rules-updated-81113/

Thanks alot for pointing me in the right direction on this!

np, glad to help