Depends on condition and whether or not it is a New Model. New Model unfired Vaqueros are roughly 450-500, depending on where you go. Older models will get around 400 to 500, depending on condition, and whether or not you have the box and paperwork that came with the gun.
100-400 or so
100-1000 USD depending on EXACTLY what you have and its condition, accessories, box, manual, etc..
100-360 USD or so depending on specifics
100-1000 depending on specifics
100-200 USD
50-350 usd
Impossible to answer without a detailed description of ALL markings, bbl length, type of action, caliber, box, papers, accessories, finish, overal condition.
Between $250-$300- but my references list that with a 6 inch bbl as longest. Sure about the 8 inch?
BBL Brakes
You will have to get it lettered to see if it left S&W in that condition. If so, one value, if not, another value. Range 100-1000 USD or more
100-500 USD
100-200 USD depending on calbier and condition