They're running limited flash deals. Pay attention!
Whilst the site doesn't have the largest catalog of games, I always appreciate the effort GOG.com puts into making its sales interesting. Right now, there's an Insomnia sale happening which is taking a novel approach to flash deals. Each deal has a limited number of "copies" and once they're sold out, that's the deal over.
There's a counter on the main page of the site showing you how many copies are left and it's compelling viewing. I've just seen 200 copies of Fez and Baldur's Gate sell for a couple of dollars in less than a minute. It's a novel idea for a sale and I'm keeping a tab open all night to see if Privateer 2: The Darkening goes on sale.
Disclosure-bot: Just in case the editor neglected to mention it, we have zero control when deals start and end. Deals can sometimes be gone within minutes (please don't shoot the messenger). Trying deal links even hours after this article's time stamp may lead to self-punching, so maybe bookmark our video game deals if you're on the hunt. Also, it goes without saying, but some shopping links do directly support the author. If you've spotted any inaccuracy please let us know asap.