where can I buy a steam key for Deus Ex Human Revolution cheap?

If you asked less then a week ago you could have gotten a great deal from Amazon... I'd suggest asking in Trade forums to see if you can trade for one cheap.

In a place that goes by the URL store.steampowered.com. You refresh said webpage at least once a day and wait for -75% sales, which happen every single day, and when you find a game you'd probably like you buy it.

After a while, you end up with >400 games that you'll not play in a lifetime. But at least you don't have to create topics like this one.

Keep an eye on this site. If it's on sale, from a reputable vendor, it will be here.

you can get it on amazon for only $14.99 but only if your in the us

I'd sell you one, hit me up when interested.

In the black market.
Not that BLACK market, you racist.

Get it from Amazon

http://cdkeyprices.com/product/Deus-Ex-Human-Revolution-Augmented-Edition-CD-Key-Steam.html/

You could of gotten another 25% off before yesterday! Still a good deal though.

Legit source and you get the key right away. Plug it straight into steam