Here's an authentic one:  
http://www.coach.com/content/product...category_id=68 
Notice how the leather on the straps go completely around and on yours they don't? 
Notice the two leather hangtags? 
Notice the difference in patches?  Coach makes every patchwork purse the same. 
edited to say:  I'm not knocking faux purses, as it is the buyers decision. I just don't want you paying all that money for a fake.  Fakes should run no more than $50 a piece.