Cheapest cd key websites??

steamgifts.com!

Just use Greenman Gaming and the other well known ones. They don't have the best prices, but you know the game won't just be removed because of scammed keys.

I see you are missing Receiver in your library.
Here take one, RECEIVER Take those who DONT have it yet.
https://www.humblebundle.com/gift?key=ctbmWsqnw3F6vE22
https://www.humblebundle.com/gift?key=zYNKuaNyZq5Rep7q

There is also another thread with unclaimed Receiver urls on the forum, if you don't manage to get this ones.

Kinguin

officially, i think, nuuvem is one of the cheapest.
unofficially, i like plati.ru

try isthereanydeal.com or cheapdeals.com

cdkeyprices.com is a good way to compare different stores.

I am buying my games from Kinguin. They are safe and cheaper than Steam Store or other stores like GMG

G2A.com ? Cheap while buying, expensive one while selling.I made some good money from it ^^

Please don't kill me.

plati.ru if you can handle Russian, they have region free games too. i used visa and webmoney to buy them, never scammed me before.

Fine, be an ungrateful dumbass then. I tried to help you, but you'll always spend more than I do and get less than I can. It's your own stupidity if you want to spend more money on these suggestions from everyone else.