curious if this is something special. i found it in a bag of quarters. the coin sorter would not accept it, twice, so i looked at it and noticed the strike.
You may be able to 50 cents to a dollar for it. But if you feel like you should, then keep it! that's the simple answer.
Make sure to check the edge. Every partial collar (aka railroad rim) I have found shows a misaligned die. I may not be, just check it if you haven't.
Only grades AU, but there are plenty of collectors of state quarter errors, and many doubtless need your coin.