$950 isn't really bad for a 3 inch 66-3. On the auction boards they bring more than that.
The original 3 inch 66, the 66-2, was made in the largest numbers. The 3 inch 66-3's come in behind it. The rarest 3 inch 66 is the 3 inch 66-4. These were made in small batches, 550 to 750 guns - two known batches - one ported one not - and are the most valuable of the 3 inch 66's.
There were some 3 inch 66-5's made including an export batch of "R99 La Chasse" revolvers for Walther. These were just remarked 3 inch 66-5's. They had frame mounted firing pins and MIM parts. They are still more desireable and better made than anything made today by the current company calling itself S&W.
I advise you to buy it, shoot it, love it. The 3 inch barrel is widely regarded as the "best" of the barrel lengths on the 66. The guns just look and feel right. Very fast handling and points well.
I used a 3 inch 66-4 as my duty gun in the 90's and early 2000's in High Point NC. Good luck! Hope this helps! Regards 18DAI