I know of a mint 52-1 but am leery of the long extractor breaking and being stuck with a paperweight. At least with a -2 the extractor can be found or made, not sure of the earlier model?
In my opinion...
It's all about price when you are looking at the potential purchase of a 52-1. Why I say this...? The market (generally, not specifically!) has basically the SAME feeling that you do. This is "oh, the long extractor was weak, will break, then the gun is unfixable" and because of this notorious legend, the 52-1 pistols that would almost assuredly otherwise be MORE valuable in the market tend to carry similar and quite often LOWER prices.
Folks that have actual long history of owning, shooting, competing with and loving the 52-1 will often tell you a couple things. First thing they often say is that the bluing is deeper, more lustrous and more beautiful. Next they will often say that their dash-1 pistols have slightly better trigger feel than their dash-2 pistols. Thirdly... many will say that they were well aware of the fear of extractor fail, so often they ordered a replacement (when they were still available) and they kept it at the ready.
And many of these guys will tell you that they never did end up using their replacement.
We have had discussions around these pages as to the validity of the legend of 52/52-1 extractor failure. My own personal opinion based on years of reading tales from owners boils down to:
--extractors can and do fail in any pistol
--52/52-1 extractor is a HARD to source part
--S&W makes changes on occasion and it isn't necessarily because an earlier design was weak, bad or prone to failure.
We could successfully argue that the 52-2 extractor is a better and more resilient design than the 52/52-1, however -- I don't believe it is necessarily fair to thusly label the 52/52-1 design as weak or prone to failure.
Bottom line on purchasing a 52-1, in my opinion:
The market typically says the 52-1 goes for same as 52-2 at most and often LESS money. If the price of the 52-1 in your opportunity to buy is right for you, I think you'll be buying a solid (and amazing) pistol. However, I can't ignore reality-- the replacement part is very difficult and expensive to source.
The market reflects that.