If it's in remotely good shape, $60 is a great price.
Typically leaks are just an o-ring that needs replacing, or an air fitting that needs re-sealed. Rarely is a leak due to anything catastrophic.
Most electro's are not designed to run on co2, but some are. I'm pretty sure the pimp was not designed for co2 use, but that doesn't mean some use ruined it. Typically condensation in the noid or on the board is what co2 ruins an electro.
Talk is CHEAP, because supply exceeds demand!