It is true that fakes of the EK do exist but on the whole they are easy to spot and mistakes are easily avoided by knowing a few background facts and conducting basic research first, such as which manufacturers actually made EKs.
The other thing to consider is never to take the 'sellers' word for it. He just wants to make money and many sellers will tell you anything to achieve this. Evaluate the item, not the seller's story. The first rule of collecting!
Post them up and let's see what you have.