Reminds me of the 100 disposable cigarette lighters for £5 on ebay. Loads of folk bought them only to receive a box of matches, which in their defense they had made sure each box had 100 matches in. Nothing could be done, they weren't misrepresented and broke no trading standards rules.
Its like the advert in the daily sport ages ago. "Guarenteed to cut your gas and electric bills in half" they were sent a small pair of scissors Cost me a fiver