It's obviously hard to tell however, I bought a pair of Jordan 4's from them and they are so close to authentic that there's no way to tell if they're anything but real. I paid 102 for them with free shipping and they got to me in NJ, in about 10 days. They were in a flight box, a little banged up, but the shoes are amazing. I've been buying and wearing Jordans since 1989 when I got my first pair of Jordans for Christmas. They were jordan 5's with the 23 on the side and I've been into the sneaker culture ever since, and pretty heavily.
I'm not saying the 4's I got are real, I'm just saying I've dissected them and myself and a few other people and cannot find a flaw. They have nice weight to them, no excess glue, no stitching problems, all the numbers are correct, and colors are all on point. I can give pictures if anyone wants them.
Keep in mind PLEASE, the 5 stars I gave for the site, represents my experience with theblueretros.com only. So always be careful, but I couldn't find a problem. They took credit cards, free shipping, shoe box, and the shoes are as near authentic as you could get if they aren't authentic. I would welcome someone to check them and tell me otherwise, and how. Good Luck and Give them a shot.