I change the key to the Metro 2033 on others game Steam

What?

I do not know if this is trading as I do not fully understand your post.

But trading is forbbiden.

I'm sure you do

no

I have a magical key. I use it to stir Cake mix

Dude i can't give you zhdrugyu its too valuable, maybe i will trade you for 2 Skyrims, but not for Metro

zhdrugyu is best if played with friend, i wont recommend it otherwise

UPDATE: zhdrugyu now has a 66% sale!

Think it's другую in russian, which means another/different. I believe he also mispelled it in the translator. Pretty funny.

9/10 would trade

I dunno, but the word DRUG pops out at me. I'm not sure that Steamgifts terms and conditions covers illegal drug trade, but I'm sure it's frowned upon.