It is very common to see this today on some flea-markets. Funny thing is that you can use the old lenses again with the new mirrorless camera's. The most lenses are remarkable good and to have for almost nothing. Oke you have to do sharpness manual but who cares. The only thing I know from experience , don't buy the cheapest adapter to fit them on your mirrorless.
I dedicate this one to weekend reflections here.