Never fired except by factor? Box, papers, etc.?
Here's my track on the gun. (Blue Book doesn't distinguish the MG from any other 686P). There was a price war on a couple a while ago on Aution Arms, I think it was> I've only found two this year. I wasn't looking all that hard but, still, two makes for a scarce year.
Smith & Wesson 686-5 Plus Mountain Gun Revolver in .357 Magnum,.38 Special, Plus P. Bluebook of Gun Values (29th Edition) indicates between $415 in 98% condition and $565 in 100% condition for this gun. I have 26 recorded prices using local and internet sources for this gun from $475 to $1063 over a period of 2087 days ending May 31, 2008. The average price as of that date was $631. Current or last MSRP is $790.