It's kind of an oddball machine and not very common anymore. It looks OK but it's probably 30+ years old. It seems relatively cheap for a 200 amp machine and looks like it has a Euro type Mig gun. Find out what contact tips and nozzles it takes. Lenco/Profax may carry them as well as drive rolls and possibly wire guides. If consumable parts are available I think $300 maybe $350 but it's a gamble on how long it lasts till something goes wrong and no parts are available. When Airco was split up some went to Esab, some went to Lincoln, some went to Koike, etc. Apparently it has been obsoleted by Esab but was a good machine back in the day. Looking online they were selling for under $500 in 2007.