Watch List notes:

The United Kingdom 2020 Gold Proof Set a 5-coin set comprising Five Pounds, Two Pounds, Sovereign, Half Sovereign and Quarter Sovereign, each coin displaying George III Royal Cypher Privy Marks, the 200th Anniversary of the Death of George III, FDC in the Royal Mint box of issue, only 500 sets issued in this format

Estimate: 3600-4600 GBP