I bought one off Amazon for around 45$ and it was legit. Granted the case had already been opened (which is why it was cheap) but it was still the real deal and worked perfectly. Pretty much anything sold on Amazon is a legit product.
[quote user="FEARecon"]Pretty much anything sold on Amazon is a legit product.
[/quote]No, actually it isn't. While most of the stuff they sell is legitimate, Amazon (or their agents) don't have any problem in selling knock-off brand HDD, external cheating devices, modded controllers, and unauthorised hardware.
Despite the consequences to us.