GOG has had a lot of pretty damn good sales lately, so I figured I'd start a thread on it.
Currently, they're having a sale on all of their "classic D&D games." That means the Baldur's Gate series, Icewind Dale series, Planescape: Torment, Dragonshard, Demon Stone, Temple of Elemental Evil, and Neverwinter Nights: Diamond edition. Most everything starts at $7.99 (ToEE is $4.79), but they get cheaper as you buy more:
So, one game is $7.99, but if you add another they BOTH go down to 25% off and thus each becomes $7.49. If you buy them all each game is ultimately ~4 bucks. I already have all the infinity engine stuff, and they apply the discount to games you already own, so anything I decide to buy now starts at 45% off.
I have grown to really love GOG. No client needed to run the games like Steam; you just download the files and they're yours forever, DRM free. They also give lots of extras to d/l like manuals, art, avatars, soundtracks, etc.
Will keep this thread updated as their deals change. There's usually a weekend deal, plus some random stuff throughout the week.
DND deal link:
http://www.gog.com/en/page/dnd_promo