I'm looking to buy a brand new 5D Mark III body on Ebay and I've come across a few listings for about $3079 from supposedly reputable sellers with 99.5% ratings based on over 30k reviews. Besides the risk of it being a gray market item, what would be another risk I could incur to save about $400? I'm using an AMEX card to fund the transaction, worst case scenario if it's a scam I could just call to cancel the charge..