Has an AFL game ever ended 150-51?
Exactly once. On March 30, 2008, Geelong beat Essendon 150-51, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 150-51 in league history.
That makes 150-51 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 151-51 has happened never and 150-52 has happened never.