Has an AFL game ever ended 175-30?
Exactly once. On May 3, 2014, Hawthorn beat St Kilda 175-30, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 175-30 in league history.
That makes 175-30 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 176-30 has happened never and 175-31 has happened never.