I would buy them even just to make the point that people still love giant robot games. Seriously, make more, says me. And I never even cared for giant robots much.. But the FASA stuff makes for incredibly good games.
Are you aware that a new MechWarrior game is being made? There is no release date yet, but there are sexy trailers and whatnot. It even introduces some new mechanics just to add to the awesomeness.
On the mecha side there is Front Mission Evolved, due Q2 2010, which is coming to the PC this time around.
I saw the first trailer that came out and almost pissed myself with excitement.
I am in no mood to buy a new computer, however, and I bet this game will require one. And my laptop is only a year old with a great vid card. So I'm hoping it can still play without stuttering if you turn some of the graphics down.
And I hope it comes out before the latest Duke Nuke'em comes out. ;)