Has an AFL game ever ended 85-80?
Exactly once. On May 16, 1981, Carlton beat Geelong 85-80, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 85-80 in league history.
That makes 85-80 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 86-80 has happened 3 times and 85-81 has happened 4 times.