Neil, I bought my set about 2 years ago and I paid $150.00 for it and it is numbered 1474. So I believe that there are more then 1432 sets minted. I have seen individual coins from the set sell as high as $60 each on Ebay. I think the key to the value is, if the set comes in the hard presentation case, and if the numbers match on all four coins to the set.
Jerry Sacco SS#673