Does any MMDer know of a list that can be used as a basis to estimate
the value of original Duo-Art rolls?  If not, how would one determine
a rolls value?  Condition is clearly a determining factor -- how about
the pianist?  What other factors should be considered?

I ask for 2 reasons: (1) If I have a roll and want to replace it,
what should I expect to pay?  (2) If I have a roll and want to sell it,
what is a reasonable asking price?

Any help or suggestions would be appreciated.

Richard Brandle