This guide is made to assist people in buying Air Jordans/Nike Sneakers on Ebay, as some people sell fakes.
The number one step is to inspect the seller's pictures of the Air Jordans, some pictures seem a little bit off as some parts are cheap looking or darker then the real product.
Another step is to check official or other authenic online stores if they sell the particular colourway of the shoe.
Always research on forums, sneaker websites and ask the seller questions.
For example if you see a purple Air Jordan IV you go to the Air Jordan/Nike site to see if they stock it, and you find out that this colour of this partcular shoe does not exist. Therefore the seller is selling a fake shoe.