Proof  Krugerrands.

How much is a 1972 Proof Krugerrand worth?

As the value of bullion Krugerrand coins is very much tied to the price of gold it is difficult to determine the price of a 1972 Proof Krugerrand. However, a good estimate for a 1972 Proof Krugerrand would be about 115% of the gold price.
On the 3 August 2016 a 1972 Proof Krugerrand was sold on ebay for US$ 1875 which would be around 140% of the gold price.