You might check Craigs List. I found this brand new in the box for 250.00. Pretty good welder for what I do.
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I got everything you see for that price, it even included a brand new in the box gas kit, and 2 rolls of wire and the self darkening helmet. I went and bought a bottle of gas, now all I have to do when I need gas is exchange the bottle. Never have to worry about the dates on them.