Brockhaus and Efron Encyclopedic Dictionary

[Steve Marder]

On behalf of a friend:

Does anyone have any idea what the current (monetary) value of the Brockhaus and Efron Encyclopedic Dictionary is? The 86-volume set is in excellent condition. (My friend is NOT interested in selling her unique collector's item; however, she _would_ like to know how much it is worth.) Alternatively, what sources might one consult to establish the value of this reference work?

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