If you're talking about the ones I'm thinking about, yeah I've been watching those for a while now. They look really nice at $100. The only issue I'm having with them is that I *think* they're Asian-manufactured (or maybe eastern European), and I can't find any real info on them. And I'm not a fan of the gauges.There are some new Linde 2-stages that aren't huge. There are even ones with a cga-320 connections. The guy has them listed at $100. There's always something cheaper if you keep digging though. Just keep looking. When you see one you don't know about, just Google the make and model number. Most of the time a PDF file will pop up.
There are almost always victor vts250's available. They are pretty small.