Attended the Mamiya bankruptcy sale here in Toronto way back when, and bought the Osawa 28 2.8, 70~150 3.5, 2x tele-converter all in Nikon mount and a bunch of the Mamiya point and shoot cameras for friends & family.
A pro photobud said for what I paid they were good enough to learn on, but when I got more discerning I'd not be satisfied with the shots they produced. He was right, and a few years later I sold them both for better lenses.