It's a tie, more or less.
My Smith & Wesson 10-8 revolver - $300 OTD, at a gun show. Purchased from an old guy, who was liquidating his collection. Absolutely the most accurate hand gun I've ever owned.
My Smith & Wesson 6904 - $300 OTD, from a local gun dealer. Beat up looking police trade-in (re-import from Canada). Had been sitting in the case for a year or more. I offered them $300....and walked out with it. Absolutely superb in every way (except the finish wear). It is now my EDC.
My Smith & Wesson 6906 - $320.20 with tax, OTD, from the same gun dealer. Also a police trade-in....but really in GREAT shape. As superb as the 6904, except in much better cosmetic condition (shows almost no wear).
The 10-8 has since gone on to a friend, since I am no longer into wheelguns, but the 6904 and 6906 will stay with me always. I wish I'd bought them years ago and skipped most of the other pistols I've tried, while looking for the ones I'd really want to keep. But, alas, experience is a good teacher.
Ironic that, the BEST I have ever had, have also been the cheapest.....