Has an AFL game ever ended 124-90?
Exactly once. On July 26, 1980, Sydney beat Melbourne 124-90, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 124-90 in league history.
That makes 124-90 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 125-90 has happened never and 124-91 has happened 2 times.