Has an AFL game ever ended 28-24?
Exactly once. On June 3, 1899, Geelong beat Essendon 28-24, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 28-24 in league history.
That makes 28-24 the 3884th most common final score out of 6,649 that have ever occurred in AFL. One point away, 29-24 has happened never and 28-25 has happened 2 times.