It's worth around $5 to $6 in excellent condition, but only $3 or $4 in circulated condition as a collector coin, around $2.75 in silver content/melt value.
Cool I found 2 silver bi-centennial halves that probably came from Grandpa's proof set while coin roll hunting, put the best one in a plastic coin holder and gave it to my Daughter as that is her birth year.