Our lowest priced 1 oz newly minted coins. These are the cheapest capital gains tax exempt silver coins on the UK market!* Brand new coins, as issued by The Royal Mint. British Legal Tender therefore exempt from Capital Gains Tax. Each coin contains 1 troy ounce of 0.999 fine silver. *We compared our prices with the top UK coin and bullion dealers on 22/1/18 and found that these coins are the cheapest newly minted 1oz silver coins on the market.