The Big List - Where to find Cheap&Trusty keys

Hello,

Since most of us could use some new keys (or just new cheap games in general) every now and then and after being scammed one too many times I decided to make a list.
I will keep it updated.

God Tier:

[Only registered and activated users can see links. Click Here To Register...]: Probably the biggest game key reseller. Not necesarrily the cheapest but they deliver fast. Each sale they will try to sell you a 'G2A-shield' buyers protection for 3�. Don't fall for it, not worth.
[Only registered and activated users can see links. Click Here To Register...]: Another well known key reseller. Had good experiences with them, around 10% cheaper than G2A.
[Only registered and activated users can see links. Click Here To Register...]: Almost identical prices to G2A, trustworthy but might take a little longer to deliver the keys on average.

Medium Tier:

[Only registered and activated users can see links. Click Here To Register...]: Cheap but had some mixed experiences with them. One time I ordered 5 keys but only got 4. After a lot of hustle I got my money back but took way too much effort.
[Only registered and activated users can see links. Click Here To Register...]: More expensive in general, but sometimes you find some unexpected sweet tdeals on here, worth looking into every once and a while. Make out that when you checkout they ask the same price as advertised, had this issue once.
[Only registered and activated users can see links. Click Here To Register...]: Their site is not very user friendly in my opinion, but they did deliver when I bought 10 cd keys.

Shit Tier:

[Only registered and activated users can see links. Click Here To Register...]: A friend of mine ordered there twice, never saw a key. Apparently they have no feedback whether their subsellers have send you the key or not.
[Only registered and activated users can see links. Click Here To Register...]: I bought a key once which was invalid, their customer service didn't even reply.
[Only registered and activated users can see links. Click Here To Register...]: They try hard to ride on the succes of g2a and kinguin, bought once but never even got an email.

Special Mention Tier:

[Only registered and activated users can see links. Click Here To Register...]: They provide a client which does heavy calculations on your pc while you are AFK. In return for your computational power you gain credits which can be traded for keys. Takes some patience but cool service, grinded a few keys with it last month.
[Only registered and activated users can see links. Click Here To Register...]: a site for price coparisons between different sites. NOT correct however, prices are not up to date at all.

Ofcourse these opions are all based on my personal and my friend's experience. If you have other sites and/or experiences let me know, I will try to keep this up to date!