The Rarest Buffalos are: 1) 1913 Ty 1 Gold buffalo. POP 1 2) 1920 D RPM D/D. POP 2 3) TIE 1919 DDO. POP 4 3) TIE 1923 2F. POP 4 Your 23 2F is very rare and is worth grading with the variety attribution. Go For It, you will not regret it.
If I recall correctly, the 1913-S Type 1 and the 1923 are the two most difficult to find. This one looks like a 1923, but it is so low grade that it might be difficult to find a buyer for it. Two feather Buffaloes without full dates are very difficult to sell.