I usually collect coins but found this hidden bill at a local antique store and something drew me to it. I know it’s not a very rare FR# from my understanding. I looked everywhere online and could not find anything on them. I checked for ones on eBay or sold ones within 90 days and could not find a single sale or listing. When sold to me this was marked as a FR-863B but someone determined from from placement and sizes of different markers in the bill it was the FR-891A (I do not know the right terminology).I asked a few buddies that are into currency and they could not give me a solid answer and the answers were all mixed. Either not common up to being a possible very rare note. Someone looked in their note book and could find this variety and the star note for it but there was no further info. Also I was reading for the star notes if the serial number does not end with a letter it is less common. Any insight and possibly info where I can look is greatly appreciated.