Welders?

I have had the $90 Harbor Freight non-gas wire welder for ~3 yrs. It does work. Have welded exhaust pipes, sheet-metal, 3/16" steel. I fixed a $400 Mercedes into a nice driver by welding a cracked K-member. As others say, it spits and leaves a ragged trace with more slag than a gas type. You need to grind more and it will burn thru sheet metal if not careful. But it has served me well, and I couldn't justify a $500 welder.