Which website do you think is the best CD key seller?

There is thousand of sites that sells PC games, pretty cheap. Just wondering which ones you guys like mostly, please give some reviews. Need to find a good website that are fast with the delivery.

Green Man Gaming
Humble Store
Amazon

All 3 are great, reliable and have some great deals. Green Man Gaming is particularly good for larger AAA game releases, while the Humble Store serves as a great place for indie games and even Early Access titles. Amazon is great all round.

Getgamesgo is apparently good too, but I personally never tried them.

g2a.com is pretty good I have not had any issues from them.

CDkeyhouse and G2a are usually the cheapest for steam keys. Never had any problems with those two.