Miller Millermatic 90 mig welder?

Theres a guy wanting to sell me his millermatic 90 mig welder for $150.00, it comes with the leads and regulator. Tried it and it doesnt seem to have anything wrong with it. I plan on just using it for autobody work and thin sheetmetal. Already have a big stick welder so i wont be using it for bigger stuff. I dont know how much they go for, but does this sound like a reasonable price?