Thanks, I've seen the ads and pricing on TDS and elsewhere so I figure I'm semi-knowledgable about the current market for Makos/Bauers and similar. Oddly enough I rarely see used Coltris on the market. Maybe they haven't been marketed in the US long enough, maybe they last a good long time, maybe they die and aren't worth repairing/selling I dunno. Just seems like an odd gap in the used market.
I had the same used issues when I started looking 2 years ago. Anything other than a 95% rebuild was not near me. I wasn't comfortable buying used off ebay from 1,000+ miles away. I mean a $20 used O2 reg sure. But not several thousand dollars in compressor. As a new compressor owner I also wasn't super comfortable having my first purchase be a potential overhaul as well, ugh.
So I ended up with a new Alkins W31. Good machine, very happy I bought from my local dealer. His price was $100 more than online, but I have since gotten a number of deals from him on parts and bank bottles. So I've come out ahead.