I just got back from GameStop and managed to pick up the Rider and Archer Breath of the Wild Amiibos while I was there for 15.99 each. Much better than the 30-40 they're going for online. I don't know if all GameStops will have them in currently, but it's probably worth checking your local store. Hope this helps some people!
EDIT: I just checked GameStop's website too and it looks like they have both Amiibos in stock