Mine is a BEBxxxx and it was the first handgun I ever bought -- with some money from my first "real" summer job and leftover paper route money. That was June, 1989 and I was 16. MSRP at that time was $422, if memory serves me well. I paid less because we had a family friend who was a kitchen table FFL right up until the Clinton years tried to kill off the breed.
The 686-3 was also offered with the trick adjustable FRONT sight. Back then, I thought it was hideous looking but if I had it to do over again I might get it!
Mine also came with the wood stocks. Pretty sure that EVERY 686-3 did. Mine never took a shot with them, I had a new set of Pachmayr waiting even before the revolver came in!
They made a lot of no-dash and dash-1. I rarely see a dash-2 so I can only guess they didn't make a slew of dash-2. Dash-3 and dash-4 are quite prevalent. I believe dash-4 was the last hammer-mount firing pin, which changed to frame mount for the dash-5.
Oh yeah, my 6-inch 686-3 is a total sweetheart.
I think you bought a fantastic revolver. When I got mine, it was a great revolver but not yet a "legend." Now in production since 1980, it may certainly be a legend by now -- or perhaps well on it's way.