Quote from Gridseed email:
"Due to our limited manufacturing ability and high domestic demands, we only take oversea order over 200 units,
The price is as following:

200-999 units: 160 USD/unit
1000+ units: 155 USD/unit

Payment before Shipment.
Moreover, you probably need a controller to get the devices going, we suggest you purchase 1 controller for every 15 devices. The price of each controller is 60 USD. For details of controller, please see http://www.diginforce.com/goods.php?id=37: "

Small chance, but hope you do better.

Depending on your final price, I'm in for 1 of 2 LA3M.