Steam key

[Sinedd]

Hello. Where can I buy the steam key for The Walking Dead except for steam itself? I tried buying it on steam, but this is what I get when I try to transfer some money there.
"There seems to have been an error initializing or updating your transaction." - this kind of error. Every time I try to transfer money to steam wallet, it gives me an error, and I'm unable to buy anything there. So, any other place that sells steam keys/digital copies?

[Sinedd]

So... There is no other place to get the steam digital copy?

[binkman71]

Amazon:

http://amzn.com/B007WWW2C8

You'll get a Steam key, I believe, since the description says a Steam account is needed to download.