As always, buyer beware. This is most certainly a grey market camera (some people care about that, others don't) and this seller has a reputation of selling used cameras as new, or missing parts: http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback2&userid=bigvalueinc&iid=230828116912&de=off&items=25&which=negative&interval=30&_trkparms=negative_30
A little one sided, aren't we?
I like being a grownup. I get to make my own decisions...
Of course, there are definitely a ton of positive comments too. As I stated earlier in the post, some people don't care about grey market -- others do, so yes you can always make your own decisions.
The trouble with the type of feedback that has been given is that it is often for shipping used cameras when the buyer purchased a new one, or taking out some of the included accessories. Slow shipping, poor communication, shipping damage -- that all happens, and I've sold about 2500 items on eBay so I know the complaints that I've had against me.
There are numerous 5D mkIII listings where it was shipped without accessories -- that should never ever happen. It just pays to do a little research and decide if you want to chance such a large purchase from a dealer who has been known to have honesty and trust issues.