If you can find any Theory 11 or Ellusionist decks on ebay for that price then please post the link.
I've searched ebay and I tend to find that for these cards ebay is amongst the most expensive place to buy.
You're much better of phoning a dealer such as
http://www.cards4magic.co.ukand asking them if they will give you a discount for buying a brick.
Quite often they will unless you are buying them as the cards are released which is when the demand is at the highest. You'll often pay for 10 or 11 and get one or two free.
Another option is to find someone who travels to the States on a regular basis and can bring some back for you.
Member of the Magic Circle & The 2009 British Isles Close-Up Magician of the Year
It's not really an optical illusion - it just looks like one!