How much would 1776 quarters be worth now?

The first U.S. quarters were struck in 1796.

If you have a dual-dated coin with George Washington on one side and a drummer boy on the other, look at the other half of the date - 1976. Your quarter is one of about 1,680,000,000 struck as part of the Bicentennial celebration. Unless it's in brand-new condition it's worth exactly 25 cents.