Silver-clad Bicentennial quarters with the "S" mint mark are highly valuable.

Proof versions were produced in limited numbers and fetch high prices.

Error coins, like double dies or off-center strikes, significantly increase value.

Uncirculated Bicentennial quarters are much more valuable than circulated ones.

The Type I reverse design is rarer and more sought after by collectors.

Professional grading can reveal hidden value in pristine coins.

Some Bicentennial quarters contain 40% silver, adding to their worth.

Recent auctions show a surge in demand for rare Bicentennial quarters.

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