You're not supposed to purchase any drugs online or otherwise without a legal prescription.
I've taken prednisone on and off for years. It's not a controlled substance but you still need to be careful with steroids. You've got to watch how long you take prednisone and how you taper off.
It's not a toy just because it isn't a narcotic. Be careful. God bless.
I am not a dr. My statements are based on years of experience and related education. Consult with the professional of your choice regarding matters of concern.