They need to have the ALL-STAR mark on the front: Sometimes side: And back: Fakes don't have the mark because the producer can get sued. Also, you will know from the quality of the material.

Where did you buy the converses? If you bought it at Walmart or other big stores, it should be real. If you bought on ebay, I am not sure.

nonot really but you can find them in sports direct and top shop for 50 too 70 pound :)