There are a lot of fake and counterfeit Nike's on eBay, particularly Nike Shox and Air's.  In fact, about 90% of Nike's sold on eBay are FAKE! This is just a simple list of sellers who you should stay away from as they sell these inferior quality Nike shoes, whether they no it or not. Many people purchase these fake Nike's and will not even realise they are counterfeit, however they may cause you to roll your ankle, snap ligaments and tendons and if you fall the wrong way, even break bones!  This list will gradually build up as members message me after receiving fake items. The Fake sellers are:

•   Flatanare
•   Brands4every1
•   2springfeet
•   clemgp1
•   smells r us
•   aus-sports
•   kq1975
•   spectrum168
•   redstreetshop
  
•   iscott05
•   sohaib102
•   bltz8008

Addition:
There are a few ways to spot the fake Nike Runners,

• If a seller states NO Refunds, this generally hints that they are not genuine
• If the item doesn't include the box (normally due to 'postage costs')
• If a box arrives it is often very weak and thin, (originals are thick and made of strong carboard), this is why they don't generally send them (very obvious it is not genuine)
• Products being shipped in from Overseas,  Especially Hong Kong and Asia (Be extremely suspicious if this is the case)
  
• New eBay users, as they often create new accounts sell a couple items, then open another new one
  
• If you take the sole out of the shows, fake shoes are often very poorly stitched, genuine products are very well built
• Fakes also, in most cases, use cheap plastics for the bottom of the shoes, genuine products are made of a very good rubber (i.e fakes are a shiny smooth plastc that slides and slips, originals are quality rubber)