Pentax ME Super and other pieces.
Briefly looking at completed EBay auctions, you're looking at around $30-$50 for the ME plus 50mm lens depending on cosmetics, function, is viewfinder clean and clear, light seals, etc.
The Pentax 28mm lens is worth about the same, closer to the high end if the glass is good. The zoom is pretty cheap.
The film is probably not usable if it was kept in the attic.
Hope that helps-