Does Coinstar Take Half Dollars?

By GovMint :

Coinstar machines typically accept half dollars and standard denominations like quarters, dimes, and nickels. These machines are designed to sort and count various coins for conversion into cash or gift cards. So, if you have half dollars that you'd like to exchange for cash conveniently, you can probably use a Coinstar machine for this purpose.

Before parting with them, you should investigate if the half dollars have any potential numismatic appeal. Some half dollars MAY be worth more than their face value alone, so it's advisable to check if they are a hard to find date, are made from 90% fine silver, or if they hold any historical significance, before converting them.

Sources Used:

https://www.ribaostore.com/blogs/news/how-accurate-are-coinstar-machines