Wow! Excellent collection, for sure!
I don´t think it seems you´re out of control.... there are people out there who buys always 02 pieces of every amiibo: one for using with the games and another for keeping in its original package. I´ve even heard of some people who are buying three of each one.
Think about it..... in the future, your collection will be worth a lot of money, probably more than what you spent.