Hi,
60gh per box @ 300 boxes = way more money via bitcoins then selling them at $1299......
just a little common sense says something is not right here...why sell when you could make WAY more by mining them yourself.
60ghashes per box @ $1299 cost = 60000 million hashes = $6100 per month at current bitcoin exchange rate. $6100 per month per box * 300 boxes = $1.8 million.
LOL.
As others have said, this income would only be for the first month, as difficulty will skyrocket immediately. So your income will instantly decrease. If you sell the coins on the market, the price will probably decline as there aren't enough buyers for the majority of the coins you're trying to dump now. If you hold the coins and slowly put them on the market (similar to diamonds), you can artificially keep the value of bitcoin really high and get maximum profit from each one sold, however, it means that your wallet will be forever expanding as you can't sell them as fast as you make them.
Additionally, if the network realized that there was 1 entity (especially one that they paid money to for a product) that controlled most of the network, I have a feeling that many people would just walk away. They'd let bitcoin die with their preorders and that'd be the end for them. There wouldn't be any trust (or very little) left in the system if someone took over the network like that. Every new bitcoin company would be scrutinized thoroughly to the point that legitamate companies won't be able to startup.
In effect, they'll be killing their own market. Currently (and probably for several months), they can sell each unit at $1500, which means a constant return and constant profit. Whereas if they mined with each unit then their ROI for each unit produced will take longer than the last. The first batch of units will pay for themselves in a month or two, but the next batch will take 4-5 months, and the next will take 9-10, even with the first units adding their hashes to the later batches. Eventually you'll never make your ROI. Or, you could, as another user said, pass off this issue to customers and let them fight over ROI calculations while you continue to sell at your fixed cost and make your fixed profit.