As of 2012, a 1976 Bicentennial quarter's value ranges from 58 cents to over $450 depending on the quality of the quarter, according to CoinWeek. High-quality coins are free from marks and scuffs and are worth the most.
When collecting 1976 Bicentennial quarters, search for those that don't have any detracting marks or scrapes. It's also equally important to find coins that are fully struck, meaning all the details of the quarter's design and picture are visible. When a coin is not fully struck, there is a good chance that those areas collect many tiny scratches. According to CoinWeek, a survey was taken to see how 100 Bicentennial quarters compared to each other after being pulled from mint sets. As expected, only a small number of coins were found to be 100 percent fully struck.