Has an AFL game ever ended 123-34?
Exactly once. On May 31, 1919, Carlton beat Melbourne 123-34, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 123-34 in league history.
That makes 123-34 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 124-34 has happened never and 123-35 has happened never.