I bought a package of use gear and this first stage is unneeded. Looks to be in good shape but I have little history on it. It was sold to me as a MK25 although it's unmarked on the model number. Asking $140/shipped CONUS. As always, with life support equipment you should get it checked out by a professional prior to being put in service.
Scubapro MK25 DIN, 1st stage only. $140 shipped CONUS
Scubapro MK25 DIN, 1st stage only. $140 shipped CONUS
