FAKE MAC WEBSITES:
http://www.brush111.com
http://www.cosmeticshotsale.com
Sometimes -> http://www.ebay.com

(http://alliesmakeupcorner.blogspot.com/2009/12/fake-mac-cosmetics.html)

EBay: On eBay be sure to read the feedback about the seller and read the fine print. Be aware and trust your instinct! If it looks to good to be true, it probably is. Make sure you buy from a credible seller and don't be shy to ask questions!

-If your product is fake you need to demand a refund.

-Make sure to be aware of what you're buying! Pay close attention to details w/ packaging and colors.
EX: This picture from http://www.cosmeticshotsale.com shows "MAC Hello Kitty Lipsticks". MAC did not come out with this many lipsticks and definetley did not have that cheap packaging with 'lipstick' on the front: http://www.cosmeticshotsale.com/index.php?main_page=popup_image&pID=137

-They're even selling fake MAC makeup bags on www.cosmeticshotsale.com, most MAC bags are glossy not canvas, cheap material.

-Unless it's special edition, MAC powders NEVER come in rectangular casing like this: http://www.cosmeticshotsale.com/index.php?main_page=popup_image&pID=176
It's ridiculous.

-I think this is pretty self explanatory: http://www.cosmeticshotsale.com/index.php?main_page=popup_image&pID=30

-Their eyeliner page is humorous! MAC never came out w/ Heatherette or Hello Kitty LE eyeliner!

-MAC eyeshadows come in circular pots w/o sponge tip applicators & mirrors if they are legit and not special editon. Even then most of the LE eyeshadows are still circular.

-MAC does not have brush rolls that come with brushes. http://brush111.com/index.php?gOo=goodspic.dwt&goodsid=338