Purchasing a sports photography camera?

I've been trying to upgrade from the camera i use now (eos t5 rebel) to a Sony A6000 because thats what I've heard is the best but is there a good affordable place to find one in a budget?

(1) ~400, usa

(2) Eos T5 Rebel with a 55mm lens want a upgrade so i can start a side job with pictures

(3) Sports mostly baseball

(4) mainly photography