Maybe some buyers don't know that late Minolta cameras have the same bayonet mount of Sony cameras. In fact, Sony just bought the Minolta business. Sony cameras ARE Minolta cameras. Minolta never died, just changed hands. Some people ignore this and probably ignore that they can use modern Sony and Zeiss lenses on certain Minolta cameras. This can make Minolta cameras less looked after.
Some other people might have read somewhere that Minolta cameras require manual focus lenses, ignoring the existence of the two bayonet mounts.
Minolta is the only line of cameras which has undergone a bayonet change and a brand change and that can be confusing for people who haven't been paying attention during the last 30 years.