Gaudens Double

What are these two double eagle gold coins worth?
Hello,
I’m trying to find the actual value for two $20 Double Eagle gold coins I own. The 1st is a 1914s $20 Saint Gaudens, and the 2nd is a 1900 $20 Liberty Head gold piece. Both coins have been graded by PCGS, and both received MS-64 grades. I’m trying to find the wholesale value of these coins. In other words, how much could I expect to receive for each coin if I sold them to a coin dealer?. I looked in the blue book for U.S. coins, but they only list these 2 coins in MS-63 grade.
How can I best determine the actual worth of these two coins?. Does anyone know the answer?. Thank you for your time.
What are these two double eagle gold coins worth?
Spare Change Ep07: Saint Gaudens Double Eagle Gold Coins