To contribute in this thread also, I will post the Videogame Bundles some sites have. This binbles worth it, sometimes you can take like 6-7 for 5 dollars or less. Plus sometimes with the games you take awesome indie music

Here is the list:
B Indie Budle http://www.indiebundle.org/
Built a Bundle [Groupees] http://groupees.com
Bundle In A Box http://bundle-in-a-box.com/
Bundle Stars http://www.bundlestars.com/
Buy Game, not Socks http://www.buygamesnotsocks.com/
GameDev Bundle https://gamedevbundle.com/
Greenlight Bundle http://www.thegreenlightbundle.com/
Indie All-Stars Bundle http://www.indie-allstars.com/
Indie Bundles http://indiebundles.com/
Indie Buskers http://www.indiebuskers.net/
Indie Face Kick http://bitg.gamingallthetime.com/producthome.php
Indie Fort Bundle http://www.gamersgate.com/indiefort-bundle
Indie Gala http://www.indiegala.com/
Indie Game Bundles http://www.indiegamebundles.com/
Indie Royale http://www.indieroyale.com/
IndieGameStand https://indiegamestand.com/
IUP Bundle http://iupbundle.org/
Little Big Bunch http://www.littlebigbunch.com/
Summer Batch http://www.summerbatch.co.uk/
The Indie Bundle http://theindiebundle.com/
The Humble Bundle http://www.humblebundle.com/
Most of them doesn't work, but if you search a little you can find good deals as I said.
Also a BIG winner is the Gala Store Beta site. You can buy games for Steam or DRM-Free VERY CHEAP.
For example, If you buy "Chaos on Deponia" in Steam, you will pay now 9,99 euro
http://store.steampowered.com/app/220740/
However if you buy it from Gala store NOW, you will pay only 6 euros
http://store.indiegala.com/index.php/adventure/chaos-on-deponia.html
Here is the site:
http://store.indiegala.com/index.php/
This have many good offers to buy, but you need to be patient and seach for new deals every now and then.
If you like you can see other sites with good offers to my thread I create:
http://www.escapistmagazine.com/forums/read/9.387688-Videogame-Database-Sites-Thread
I hope I helped ^^