Hopefully you didn't try to order them. Ebay is full of scams. I foolishly attempted to order a set of revolution gears from Ebay a while back. I placed the order and a few days later recieved tracking information for the gears. When the order was delivered it was nothing more than a thank you card. Since the card was sent with the tracking Ebay listed the order as complete and delivered. I'll never use Ebay again.
I buy stuff on eBay all the time for the most part without issue or scams at least on auto parts in my experience. However, I am careful about choosing a seller.
In situations like yours where the item delivered does not match the ad description, eBay will refund your money if the seller won't. It's actually fairly safe compared to other venues.