I bought my 500C/M in February of 2012 I think. It had just undergone a full CLA from Mr. David Odess here in the US. Aside from a few scuff marks on the back of the body (common where the backs are slid into place incorrectly) it was rated as "EX" by KEH representatives. So I'm quite certain that I have a 1977 model Hasselblad 500C/M that will certainly last for many more decades to come.
However, I wonder what this will do for the used market prices?
I currently own the 500C/M body, a single A12 back (early model), the 80mm 2.8, the early model WLF, and a few accessories like the lens hood, left handed grip, the bellows hood, and the Polaroid back.
I know for certain that I want to add the 150mm f4, and possibly the 40mm or 50mm f4 lenses to my kit, so I hope that prices don't shoot through the roof in the next year or so.