Has an AFL game ever ended 77-24?
Exactly once. On May 10, 1902, Essendon beat Geelong 77-24, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 77-24 in league history.
That makes 77-24 the 3884th most common final score out of 6,649 that have ever occurred in AFL. One point away, 78-24 has happened never and 77-25 has happened 1 times.