What would I use such a thing for, you ask? Well I use mine for running an O/A torch, or for running O/P.
Free oxygen.
I do not have this concentrator. It is for sale at the Hi Mart (thrift store that used to be a K-Mart) on the corner of Rt1 and Rt123. It's going for $50 and refurbs that are used by lampworkers usually go for $300+.
I would buy it and pass it on to whomever wants it, but I spent all my play money on a lathe this morning.
Stuff I will trade for: PWM controllers, steel sheet/rod/bar (4130/410/1050/toolsteel), ITC, casting supplies, wood tools, silver, oxpho blue, gun stuff (9luger/357mag/12g/7.62x54R/22LR), hammers, stakes, or pitch me!
Quote: "Nissan Maxima"
(on Pennsic) I know that movie. It is the 13th warrior. A bunch of guys in armour that doesn't match itself or anybody elses, go on a trip and argue and get drunk and get laid and then fight Tuchux.