The Brook's Steam Up in Brooks Oregon is going on at the end of the month. They have a swap meet there for stuff like that. I have a large collection of appox 80 old gas engines, but I have no more room at the moment. Mine date from 1929 to about 1974. That is quite a find you have there with all the extra parts and paperwork. I had a chance to buy a Witte hit and miss gas engine a few months ago, but it was missing the magneto and carb. Whoever gets your Witte will be one lucky fellow. I have no idea as to value of your engine. Got to the SMOKSTAK old engine website and check out prices there. You might also go to YOUTUBE and check out the SmallEngineMechanic page. He knows a lot about Witte engines and may be interested in it.
EvilDr235