Deathknight, I appreciate your optimism, but if you saw appreciable framerate increases from a 272 poly decrease, then your computer really needs some help
There have been a lot of low poly models released, but it's a lot of work for one person or team to have a unified pack. Here's the low poly stuff that I use:
Ollj's low poly
pack - Alien offense and defense chambers, skulk, hive, gestate, some projectiles, and sentry, turret factory, and health pack. Each model is around a 50% decrease in polys, and stay true to the originals.
Dr Fuzzy's Doom
pistol and
shotgun - really low (~50) poly v_models
Maus' 31 poly
lmg - a 31 poly lmg v_ model
Arson's low poly
turret pack - ~60% reduction in polycount, and they don't look that bad. I prefer Arson's low poly turret and factory to Ollj's. Just a personal preference.
The Real Quasar's
phasegate - ~50% reduction in polycount, but he missed a few polys I'm sure he meant to delete, and there are other ways of rearranging the polys for even more reduction. I plan on doing this at some point in the future. [EDIT] I did this in my low poly marine structure pack[/EDIT]
Grizzly's
world models - the peewees are already low poly, but hey, why not?
Million's
gorge - Laughably poorly skinned, but it's certainly low poly
There have also been a few "lego" packs released for the marine structures, but they're all horrible IMHO.