What can anyone tell me about roll top desks designed by Nelson for Miller?
1965-1975ish. About 5'6" wood roll top, black sides, and aluminum legs.
How do I know the value?
How many were made?
Are they a rare find?

I am thinking you most likely are referring to this desk, part of the Action Office system designed in collaboration with Robert Probst.

Depending on condition, configuration, where and to whom you are selling, a retail price would probably vary between $1200-2000. In most areas I would veer toward the low end of the range....a good bit lower even if in need of repair.

You can read a bit more about this design at this website as well.

Barry Bryant
GOMOD.COM :: bringing modern design home