I still have the model 10 heavy barrel that I was issued the last week of 1973.... It's an outstanding piece - but not particularly rare or valuable. I've kept it over the years more from sentimental value than anything else - but it does have a glass smooth action (single or double) and is still utterly reliable - no matter what the circumstances. When semi-auto pistols were finally allowed on my agency, and many others (early eighties) the market was flooded with used service revolvers (of every make) to the point that you couldn't give them away. Years later, folks began to consider them for their collections - but they're still the basic no frills model (no adjustable sight to get out of adjustment and the heavy barrel to aid in double action shooting...).
As most have said - make sure you can actually examine the piece before any purchase since many saw very hard use (and not always as a firearm...). By the way, I also owned several model 64's during that same time frame (both a four inch and a two inch). Every stainless revolver I ever had would tend to bind a bit when it got hot during an extended course of fire... No matter how hot the basic blue steel model got (the model 10) it never changed it's action in any way....
