Has an AFL game ever ended 51-35?
Exactly once. On July 15, 1899, Essendon beat Sydney 51-35, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 51-35 in league history.
That makes 51-35 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 52-35 has happened 1 times and 51-36 has happened 2 times.