The Franklin Mint is a private mint in Pennsylvania, USA which produces all sorts of collectible pieces, notably coins and medals. Their work if of the highest quality and their products display pleasing artwork. Some of their coins are made of gold and silver.
The Franklin Mint produced proof sets for the Bahamas between 1966 and 1978 that were housed in red velvet display cases. These were sold to collectors for prices substantially higher than their actual value. Trading Franklin Mint products on the open market usually realizes prices that are much lower than the original retail prices. Such behavior is typical of modern collectible coins, whether produced privately or by national governments. The products themselves are very nice, but they do not hold their value.
The red velvet 9 coin sets usually sell for $40 to $60 US dollars on Internet auction sites like eBay. If you wanted to sell your set to a coin dealer, he or she would probably offer $20 or so. If the coins are damaged, tarnished, or corrupted in any way, or if the packaging is missing or compromised, the value of the proof set will be much less.
The nine coin set contains 95 grams of sterling silver, so its retail price should not go lower that its silver content. 95 grams is about 3 troy ounces of silver, and sterling silver is 92.5 percent pure. If silver is trading, say, at $15 US dollars per troy ounce, the value of silver in the set is 0.925 x 3 x 15 = $41. Go to a web site such as kitco.com to look up the current value of silver.