The 65 is no more or less stout than any other K frame .357, as the others mentioned a few times above. All the pluses and minuses the K frame offers are also in the Model 65, but the stainless construction and snag-reducing fixed sights do make it pretty darn nice for damp-weather belt holster carry when traipsing about. As is commonly known, the S&W L frame .357 was developed to address the durability shortcomings of the K frame, and the L frame 581/681 fixed-sight and 586/686 adjustable sight .357’s have done so admirably.
The $1,350 price tag for a Model 65 is huge. If there is no collector panache, like an odd barrel length, or it belonging to a famous owner with provenance, then IMHO the shop is REALLY swinging for the fences with that one.
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My Plain-Jane, Hogue-gripped 4” Model 65-3 missed out on the P&R era, but it still locks up well and shoots nicely. (Seen here with its “little sister,” a Plain-Jane 4” Model 64-3 .38 Spl.) Laughingly, if I could get $1,350 for this 65 I’d sell it tomorrow and buy the nice walnut-boxed 6” Model 27-2 .357 that a LGS has for sale for $1,650.
Stay safe.