they probably made a mistake assuming they had a size in which they didn't, then whatever checkout system they have probably checks their actual stock and if they have it great, if not, you get an OOS and they either ninja edit the size run or have the system do it. I like them too but maybe...
AT 168$, I bought mine at 200$ and i think they are worth it, mad that they went on sale after i bought them off ebay a day or two before, i say TREAT YOSELF PLAYA, you deserve it