What is the value of a 1776-1976 US quarter?

Answer 1

First you have to determine whether the coin is silver or just silver in color.

If the coin has no mint mark or a D next to the tail of Washington's wig, it's made of copper-nickel and worth 25 cents. There were several billion minted in honor of the Bicentennial. Most were "collected" (or at least saved) so there are millions of uncirculated ones available for 50 cents to a dollar.

Those with an S mint mark were made as both copper-nickel and 40% silver sandwich coins. The core of the latter coins is 79.1% copper and 20.9% silver. The outer layers are 80% silver and 20% copper. All S-mint quarters were sold in collectors' sets and not released for circulation. Prices as of 10/2009 were as follows:

Uncirculated, 40% silver : $2.25 to $40.

Proof, copper-nickel : $2.50-$10.

Proof, 40% silver : $2.30-$13.

Answer 2

30-500