Hello there! That's a fantastic question. The search results provided don't contain specific details about Bicentennial half dollars, but I can certainly help you with that from my general knowledge as a content expert on the topic.
Most Bicentennial half dollars you find in your pocket change, the ones with the dual date 1776-1976, are extremely common and are generally only worth their face value of 50 cents. These are the copper-nickel clad coins made at the Philadelphia (no mint mark) and Denver (D mint mark) mints. Hundreds of millions were produced, so they aren't rare.
However, there are a few versions that are definitely worth more than face value. The ones to look for are the 40% silver versions. These special collector coins were minted in San Francisco and will have an "S" mint mark on the front. Unlike the common clad coins which have a reddish-copper stripe on their edge, the silver ones have a solid, silver-colored edge. These are worth their silver content, which typically values them at several dollars, depending on the current price of silver.
Beyond the silver versions, any Bicentennial half dollar in pristine, uncirculated condition can be worth a premium to collectors, sometimes fetching a few dollars. Also, keep an eye out for error coins. The most well-known error for this coin is a Doubled Die Obverse (DDO), where you'll see a noticeable doubling of the letters in "IN GOD WE TRUST." These error coins can be worth anywhere from $50 to several hundred dollars, depending on the condition and the strength of the doubling.
So, to sum it up: check the mint mark for an "S" and the edge for silver content. Otherwise, look for coins that are in perfect, shiny condition or have obvious minting errors. Happy hunting
