Has an AFL game ever ended 108-103?
Exactly once. On June 17, 1933, Richmond beat Sydney 108-103, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 108-103 in league history.
That makes 108-103 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 109-103 has happened 2 times and 108-104 has happened 3 times.