I have a voucher for free Mt. Gox Yubikey, it expires at the end of January. I have no use for it. I got the same email back in July as this guy:
https://bitcointalk.org/index.php?topic=98335.0The price for the Yubikey from Mt. Gox seems to be 30 USD, but I'm willing to sell the code for
0.5 BTC (~6.5 USD!). Send me a PM if interested.
My rep/post count is low, so if you have a higher rep (say 5 meaningful posts, not obvious scam) I can send you the code first, you'll verify that it works and then pay me.