I came across an old train set from my grandfather's house.   I want to sell it, but have no clue what a reasonable price is.   It's a Bachmann "King of the Road" HO scale.   It's all in the box, never set up.   It comes complete with track and diesel engine with lights.   I also found N scale individual boxes.   One says "Penn Central"; another says "Sea Board Coast Line"; and "Norfolk and Western".   Any help with pricing would be greatly appreciated.