I bought a spool gun (with the 10 foot lead) for my Hobart Handler 210 mig welder, played with it for about 15 minutes and stuffed it in the box. I bought a roll of .030 and a roll of .035 aluminum wire for it and some additional tips from my local welding store. It's pretty close to new in the box and it seems that I wind up using my tig for aluminum (I wasn't sure I'd ever learn to weld aluminum, but I'm getting better so I don't use the spool gun).
I paid $199 for the spool gun, $18.99 for each of the rolls of wire and I probably have $10 in additional tips/consumables.
$190 shipped OBO.
I also have a 40 cu ft bottle of argon (just filled by my welding shop, so it's completely full) that I might sell with the spool gun if someone needs it. If not, I'll just keep it as a back up for the TIG.
$90 (I can't ship the bottle)