Upload & Sell: On
The 5D3 has like a 12 shot buffer, which is nothing when you're shooting quick moving stuff (first looks, presentational, PJ portraits, etc.).
I realize some people don't shoot like that, but I, and lots of others, do.
Two Mann shoot about 10.000 images a day. They used to do that with the 5D3. Sure it is the buffer that holds you back?