I saw FO1&2 in the bargain bin at best buy for 10$.
Fallout Tactics is pretty good. No where as near as good as 1&2. Its more of a X-com type game.
In recent news, I geuss Interplay announced that they will publish Fallout 3, along with other sequels. And are having outside development.
http://pc.ign.com/articles/506/506931p1.html