Mint State (MS) 70: An MS 70 Proof Bicentennial silver dollar in perfect condition can be highly valuable. These coins are extremely rare and typically command prices well above the melt value of silver. The value of an MS 70 Proof Bicentennial silver dollar can range from $2,000 to $5,000 or even higher, depending on market demand and the specific characteristics of the coin.
Mint State (MS) 69: An MS 69 Proof Bicentennial silver dollar in near-perfect condition is still considered a valuable coin. While slightly less valuable than an MS 70 coin, an MS 69 Proof Bicentennial silver dollar can still command a premium price. Its value can range from $1,000 to $2,000 or more.
Mint State (MS) 68: An MS 68 Proof Bicentennial silver dollar is another valuable coin, although it may not command as high a price as an MS 70 or MS 69 coin. Its value can range from $600 to $1,200 or more, depending on its exact condition and market conditions.
Lower Grades: Proof Bicentennial silver dollars in lower grades, such as MS 67, MS 66, and below, may have values that are closer to their melt value of silver. These coins can still be valuable, but their prices are typically more affordable compared to higher-graded coins.
It's important to note that the specific value of a Proof Bicentennial silver dollar can vary depending on a number of factors, including rarity, condition, market conditions, and buyer interest. Consulting a reputable coin dealer or obtaining an appraisal from a professional numismatist can provide you with a more accurate estimate of the value of your specific coin.