For sale is a Hobart Mega Flex 650 RVS Welder. It works fine, I ran it in my garage. Has MIG and stick functions,also carbon arc gouging and TIG mode (but you will need a high frequency adaptor such as Miller HF-251-D, to do TIG) Comes with a Hobart 27 wire feed and a spool of aluminum MIG wire.
Can do 650 amps at 100% duty cycle -- this thing is BIG. Comes with big ground cable and clamp, stick cable, and wirefeed, but no MIG gun.