picked up a used tig setup a few weeks ago. it literally had 2 hours of run-time on the meter, so it's in good shape.
i've been spending about 20 minutes every other day or so playing around with it, moving a puddle, butt welds, laps, fillets, tubes, etc. i did a little bit of stainless, but haven't tried aluminum yet.
part of me wishes i would have gotten it years ago when i upgraded the mig, but at that time i didn't want to spend the money on something that was so unknown...