Has an AFL game ever ended 104-81?
It has. 104-81 has been a AFL final 7 times in 16,622 games. The first was Essendon beat Geelong on June 29, 1968; the latest was Geelong beat Footscray on May 19, 2017.
That makes 104-81 the 191st most common final score out of 6,607 that have ever occurred in AFL. One point away, 105-81 has happened 12 times and 104-82 has happened 2 times.