Has an AFL game ever ended 39-30?
Exactly once. On July 30, 1898, Fitzroy beat Geelong 39-30, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 39-30 in league history.
That makes 39-30 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 40-30 has happened 2 times and 39-31 has happened 1 times.