I bought a Campbell Hausfeld 80 amp wire/mig welder for $249.00 and it has turned out to be a real work horse. Surprised me as I didn't think it would hold up that well. 4 amp range settings and variable control over the wire feed. I've burned up about 3 dozen rolls of wire welding just about everything and haven't had to replace any parts yet. For lightweight general use it seems to be a pretty good buy. Found it at a Wal-Mart and thought for the price it was worth a try. It will kick off if you really push it hard and it gets too hot. Turns back on when it cools down. Even has the gas regulator and hoses for the argon bottle. Have to find your own bottle though.
I have a 220v Lincoln stick welder that doesn't get much use after I picked up the wire feed. Love that machine!