I just finished cleaning my room and found an old League of Legends PAX Jax skin code from PAX 2010. I'm not sure if it has been used or not. I don't play League, so I know I didn't use it for myself, but I may have given the code to a friend, though that would have been on the NA server. Supposedly codes can be used once on each server (or at least that is what I have been told in the past), so if you use it, please say so and say what server you used it on. Or if you find that the server you tried it on isn't listed below but the code has been used on your server, please say so.
PAX Jax skin code:
EPUWMVLH9SEXEVX8
Servers used on: NA, EU-W