Title tells it all, just looking to get an idea on prices. I'm ready to pull the trigger ASAP

Hello, I am looking to purchase some lower cost asics to get into mining. I'm looking for Antminer s7's, gridseed orbs, and Pinidea Du-1 asics but i would also be interested in asics that are usb based like gekko science and block eruptors. I am 17 and want to start mining sha256 and scrypt in order to build financial independence from my family. Any help, offers, or suggestions would be appreciated.
-Gibbs