Are you looking to buy new or used?I'm actually looking just for the two stage regulator. I will put the post body on myself.
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.
I haven't looked/found a PDF for it, but just from immediately looking at it, the maximum delivery pressure on that regulator might not be enough, especially if you are using an atomic diffuser.Eevbay 110998388539 any good? Can't find info on it.