Zchinque: I'm not American, but I can tell you that it is $6,69.
www.steamprices.com to compare prices between Steam regions.
anaheim85: Thanks! Didn´t know about this site. Okay, so would s.o. from the U.S. be so nice and gift it to me? I will pay via paypal. Steam name is also anaheim85
Are you a Rainbow Six fan or new to the series? If you're new to the series, I'd say go for Rainbow Six 3. it's more tactical, and is a challenging game. Open maps, so you can take alternate routes to fight the terrorists.
The Vegas games are fun, but have some issues. They are your standard run and gun type game with linear maps. The biggest problem is when you play terrorist hunt missions, terrorists are spawned as the mission goes along. In 3, the terrorists are all spawned at the beginning, allowing you to sweep the map. In Vegas, you're backtracking a lot because you didn't set off the spawn sensors.
Also, wait till the last day of the Ubisoft sale, just in case they do a Rainbow Six or Tom Clancy day.