Where can a person buy used tires?

[PieEyedPiper]

I have one severely worn tire, and I think being AWD, it would be prudent to replace it with the same tire at say 50% or better tread life.
I'm looking for a BFG g-force sport 205/50/17.

I've tried ebay and some google searches, but I've not had a lot of luck. If you know of a good place online to pick up such items please let me know.

Thanks!

 

[Defiant]

Trying to match a specific tire and condition will be a treasure hunt. It'll be where you find it. You may want to try your luck in the Classifieds here.