I've got a set of 4 snows off my wife's Focus buried in the basement (205 50 16) - used 1 season then I went to snows on rims which kind of forced me to 15 inchers, so I never used them again.
I'm pretty sure they're Michelin's top of the line from about 2002 and, guessing here, I'd say they have no more than 4 or 5k on them - my wife does no more than 10k a year.
If anyone's interested I will dig them out and get the exact model name and I can take tread depth of you want.
If you're interested they are available as a set of 4 and for 30% of what I paid which was $100 each.
And at this point I guess somebody will tell me if I should have put this in the classified forum - but hey, he started it right? ;-)