Hi, bit late I know, but I had to comment on my recent experience with Mobile Magic.
I bought a D7000 from them last year via amazon market place and it had a focusing issue. I contacted Mobile Magic and they suggested sending it back to Nikon, rather than them, for fixing under warranty, which I did. The Nikon service centre I sent it to couldn't find a fault so I contacted Nikon head office who asked me to send it to them. They eventually came back to me and told me they would fix it, but it would cost me as the warranty was void. Apparently Amazon market place is like ebay to Nikon. They viewed my camera as being already owned by Mobile Magic. Eventually they agreed to honour the warranty if I could get the original purchase receipt off Mobile Magic. However Mobile Magic repeatedly ignored my emails requesting the original receipt or requesting they take the camera back. I tried to go through Amazon, but by this time it was to late for Amazon to help.
Thankfully after writing to Nikon customer services they agreed to fix. Thank you Nikon
So to summarise I bought the camera in June and didn't get a working one until Jan! I cannot add up all the emails, phone calls, messing with focusing or taking test shots I have done because of this. I hated not having a camera for 6 months and for that reason I will never buy expensive objects from Amazon market place again.
They are cheap and get good ratings on Amazon, but buy at own risk!