I'll stray from the fold... leave it! I'll bet you don't even want that barrel length, do you? If so, then reconsider.
My first .357/.38's were bought last autumn from CDNN. New closeouts - no longer catalogued by S&W. I bought a new 10-11 in 2" for $280 and a new 6" 66-6 for $350 + $15 S/H + ffl. The 66 came with a Redfield scope adapter - whose sale further lessened it's price. According to S&W, they were 1/03 vintage - the 66 even has the infamous hammer lock. I was spoiled. No used 66 prices will ever impress me - unless they are less than $300! But then, I live in Alabama - mecca for good (aka 'cheap') gun prices.
Now, with local prices there in mind - and, if you really want a short barrel 66, a good gun is worth what you will pay for it. I really like my 66, although I have no plans to give it a diet of anything but .38 Spcl +P maximum loads, albeit most will be in .357 brass. Really nice revolver... the 6" is a very natural pointer - and well balanced (Hoque wood monogrips help...).
Stainz
PS That 2" 10 is a delight as well...