Already been tried, read over the last 20 or so pages. Kano tried buying 1Ph himself.
At time of writing I can load a cart with the MOQ of 3x lots of 20x 821s and start the checkout process. Now maybe that's as far as I would get, but assuming they validated the order then it appears that one buyer could purchase 60x 821s (66 to be exact since each lot includes 2x "free" units) for $120,825, including shipping. That works out to about $1830/miner. Not exactly a steal, but better than the prices from Canaan's approved resellers.
Then you have to add shipping (and then shipping to get everything from point B to points C, D, E, F, G......).
The $120,825 did include shipping. However, you are correct that re-shipping to everyone would add some cost. That could add $50-100 depending on location. Considering that their resellers are selling 821s for $2899/unit we'd still be money ahead even with the double shipping.