Complete and running, put it on a stand and get a compression test out of her, show a pict with valve cover off and I would say its a fair asking or selling price depending on who is buying, just clearly state good running motor, here is the compression and these are all the things i added.
tin, exhaust, ect ect.
I have poeple who would but that motor, i sell used dirty runners for 5 to 800 depending on the condition.