What is the value of 973-1973 1000 years of British Monarchy?

Assuming you refer to the Franklin Mint boxed set of 50 silver ingots depicting British Monarchs from 973 to 1973, starting prices on the internet commence at around £600 and go up to £5,000 GBP.

Value would depend on the condition of the ingots, the packaging and the inclusion of the Certificate of Authenticity.