What would a 25-volume set of funk and wagnalls from 1966 be worth?

The value of a 25-volume set of Funk & Wagnalls from 1966 would depend on factors like the condition of the books, any special editions or rare features, and current market demand for vintage encyclopedias. Generally, vintage encyclopedias like these sets are valued more for their historical significance rather than monetary worth. You could check online marketplaces or consult with antique book dealers for a more accurate valuation.