One caveat to my earlier recommendation of the Eastwood welder would be, the welding gun. I just noticed that mine was cracked yesterday. And although I can't pinpoint exactly when it occurred, I'm not super rough with my tools so they must break somewhat easily. Nothing a little electrical tape couldn't fix, but I thought it was worth mentioning.
Thanks, wish I could say all my welds turned out as good. And they're a series of single tacks, but done in a half moon, overlapping pattern. Definitely worth the price that welders are going for now. If you could get some side work done with it as well, you're right, it'd pay for it's self and then some.
I second the Eastwood 135 MIG welder using 75% Argon / 25% CO2 mix shielding gas. Mine runs off 110v in my garage and offers a variety of settings to fine tune the weld.
The attached image shows a weld I made last night while replacing my 240z's floor pan.