Hey Briggs,
those are good points that Bob makes, but other factors come into play too. For me to look at something used is usually a 3 hour drive, one way. So I have become pretty reliant on buying stuff online. I just bought the Eastwood 200 on Ebay, where it was only $699 plus $50 for shipping. Pretty hard to beat. It has generally good reviews, and I'm quite sure that for a hobbyist, like most of us, it will do fine. All their parts are industry standard, so it is pretty easy to get the consumables locally, like here at NAPA.
I run my Lincoln MIG 180 off 220V, so I'm not too sure how you'll do with a 110V, but the TIG might give you better results than a MIG running on 110V.
I used the Eastwood tubing notcher for my roll cage, and although it looked dinky at first, it worked flawlessly. It will do another project easily. Now that I have two welders, I can't just have one project.
How often have you used the Eastwood 200? If it wasn't for the reviews online and the customer service I've read about the company I wouldn't consider that unit.