See if your dad will order something cheap first. It sounds like no matter how much proof he gets he won’t change his mind. So order string or something
I’ve bought $500 worth of yoyos in a single purchase and I live in Brazil, it doesn’t get safer and better services than this even if the shop is your neighbor.
If your dad really won’t buy it from here, there are some australian yoyo shops, google is your friend.
YES!!! My dad bought it of Amazon last night! I can’t wait for it to come! Also, for some reason, shipping prices on this site were $30. Probably because I’m in Austraila.