I miss those wonderful Pentax viewfinders! I had an ME SE with a diagonal split prism finder. Very useful for focusing on objects with horizontal details. I still have a 645. It is well built, and I still plan on using it some. The last 35mm Pentax I had was a ZX-M. Not as nice a viewfinder as the old ME, but still way ahead of my Oly dslr.
Did you say you got it with the 50/1.2? I understand that was not the standard issue, which would have been the 50/1.7, a fine lens btw. The 1.2 was incredibly soft wide open and not terribly sharp at f/8 either, at least compared to the 1.4s and 1.7s. Still, the 1.2 wasn't cheap, and if you got a good one with a camera for $15, then you got a real deal!
MrDave