Has an AFL game ever ended 80-67?
Exactly once. On April 2, 2016, Essendon beat Melbourne 80-67, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 80-67 in league history.
That makes 80-67 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 81-67 has happened 2 times and 80-68 has happened 6 times.