I want to buy replica shoes like nike and adidas online for cheap.. and I was wondering from which reliable & legit site I can buy them from and if they do accept crdit card and Can they ship it to The Middle East i.e QATAR thanks for the help...

Why not buy Nikes off eBay.
They might be used but they should be cheap enough.
nike tennis shoes, great deals on Clothing, Shoes Accessories, Sporting Goods on eBay!

Amazon sells them too but they are like $60. But look new.
Amazon.com: