Boy, things change.
Toaster Tank models were ignored, sold cheap, and generally unloved by the BMW faithful when they came out. The lollipop colors just didn't cotton to the "all BMWs are black" crowd. A lot of them had the tanks tossed, the side covers too, and converted to "Black Beauties".
Back in the early 80's you could buy Toaster Tank models all day for $1000. I did, 4 times. When I made $500 on them when I sold them, I was happy as a pig in poop.
'66 BMW R60/2, '83 BMW R100RS,'81 BMW R100RS "Das Beast", '87 BMW R850R '77 Honda XL125