I own this little guy, and I paid $370 a few years ago. For $320 it might be NLA, but call to be sure. It has done everything I needed- subframe rails, brackets, body work and patches, floor boards, exhaust... and done it well too. No hiccups, nothing broken, etc. For the price, I don't see how you can go wrong. Especially if you're on a budget now and you know later you plan to buy a TIG or even a bigger MIG.
Edit- a buddy bought a HH140 from these guys. His was "B" stock, even cheaper, but it was obviously used... spatter on the lid, some dents, etc. It works fine and he was happy to save a few bucks and didn't mind the visual blems. http://www.toolking.com/category/tool-king-specials/reconditioned-tools/reconditioned-welding-machines.aspx