I recently bought a Vivitar Series 1 70-210 in Canon FD. It was rated EX, and the lens looks brand frickin' new, except for the front lens cap. The only issue is that the zoom is really uneven (sticks in some places and is really stiff in others) and is even worse in macro mode. It's only a minor inconvenience, but I'll get it fixed eventually.
Other than that, it's a great, beautiful lens and I don't regret my purchase at all.