In the 1st book draco tells harry that his mother is getting his wand at olivanders while hes getting his robes, could his mother have bought a large batch of olivander wands made of the best materials as she felt her son deserved the finest wand and after doing so they returned home [The only reason i can think about why they didnt test them at olivanders is because they didnt want to be seen in such a small dusty shop] so draco could try all of them out until he found the wand that chooses him and then they threw the rest out.

what do you all think?

also too those who only watched the films harry and draco first meet in diagon alley when they where getting there robes, at the time draco didnt know he was tlking to harry potter till after they meet again on the hogwarts express where they first became enemys rather then at the castle like in the film