Rogue Leader :
drtweak :
aakeys.com is a legit site. I have had numerous people buy from there without issue. A 10 Pro key is 47.99
Not a single site that sells keys like that is a "legit site". They are all selling non-saleable keys. Maybe you've gotten lucky but as posted above even Kinguin and G2A has such keys and they are deactivated all the time.
Any person with any kind of common sense would look at kinguin and know that site is fake. I mean comon look at it?
with aakeys, I know of 2 dozen people who have bought windows/office keys without issue, get the key within about 6 hours, and go on their marry way. The first person I knew who bought one was almost 5 years ago and still no issue. Been almost thinking of getting a win 10 pro license for my tablet that came with Home.
Also if anything they have paypal if you want to be safe about it.