i cant go above 50$ so what is the best keyboard i can buy at this price (blue switches)If you want a high-quality mechanical keyboard with mainstream blue switches and RGB, it's not going to be under $50.
As knockoffs go, you probably won't do much better than the Redragon. They tend to do a decent job faking higher-end products as these things go; for example, I was surprised how adequate the Redragon MMO mouse was when I used it while my primary mouse was being RMAed.