1: Rare Bicentennial quarter sells for $350,000

2: 6 more Bicentennial quarters valued over $80,000

3: Collectors seek out valuable Bicentennial coins

4: Demand for rare quarters continues to rise

5: Investors see potential in rare coin market

6: Bicentennial quarters fetch high prices at auctions

7: Rare coins add diversity to investment portfolios

8: History and rarity drive value of Bicentennial quarters

9: Tips for identifying valuable Bicentennial coins