From the APG sales in Melbourne, Sydney & Brisbane in 2016, 450 yearlings were in the sales, 364 horses were sold, the rest passed in, withdrawn, or transferred. (I am not including the PI lots as I do not have any info on them).
On Friday night 21 2yo's will race in the 1st lot of heats in Melbourne at Melton, 3 heats with 7 in each heat.
Good luck.