I have never owned one but the few I have seen seem to be decent quality. Basically, and assuming you like the gun, I think it would be a matter of price; at $300 or so it would probably be worth taking a chance. More than that would, IMHO, be iffy.
I was looking into an Astra .357 a year or so ago. I can't remember if the 960 and the one marked ".357 Magnum" on the right side of the barrel are the same or different models. And, whichever one it was it was HEAVY, like N frame heavy. Probably a nice gun, but hard to find parts for. I'd also say in the $300+ price range for a nice one.