My only member of the 686 family is a 5" half-lugged 'Stocking Dealer Exclusive' 686+ from 2004. It came stock with a V-notch rear sight, HiViz front sight, and Ahrends square conversion/fg cocobolo grips. Quite a deal back in '04 for $489 + s/t new at a lgs (The good old days!). I keep several HKS #587 speedloaders loaded with .38 Spcl +P 158gr LHPSWC at the ready for it, even though it resides in the safe. Every caliber/count revolver I have has a speedloader loaded with defensive ammo 'at the ready' for it, no matter the revolver's normal function. The 5" 686+ was my SPC revolver - until I got my 4" 627 Pro (8 shots beats 7... especially when you miss the stop plate!).
Those 7-shot speedloaders, HKS #587, work well with Ahrends wood grips and the OEM Hogue rubber grips, too. Most dealers stock them - you can even get them for <$10/ea with free s/h from AMAZON with their 'Prime' membership!
About gun prices... the marketplace is a bit skewed. $600 is probably a good price these days, especially if it comes with the box and original Hogue rubber monogrip. Good luck on finding ammo!
Stainz