I was debating about putting this on here, but seeing as Valve has done this twice now for Halloween, somebody may be interested. Anyways, they’ve been putting Team Fortress 2 on sale for $2.50 on Steam for 2 hours a day for the last two days.
So it looks like they may pull this stuff off again for at least a few more days. (Up to Nov. 2nd most likely, since that’s the end of their Halloween event for TF2.) So keep on the lookout if you’re interested.
(Ninja Edit: Apparently there was another sale today, but according to the TF2 blog, it was the last one, so too bad.)