don't think it's 2 stage. It has two air filters >> single stage. If true, I would guess 3hp , 11-ish cfm@90psi.
I guess it retailed for $550 ~ $750. Worth every bit of $200 -gladly - as long as you hear it run and it doesn't knock. Even if it does, you can get a nice replacement pump for $175.
By the way, where did you say it was at???
