In the next few days, Bitmain will adjust the price of the S1 miner on a daily basis. We will reflect the shipping date difference, which means every time our website store manager deliver the order information into the shipping system at the 18:00PM of Beijing, the price will be adjusted. So please don't be pissed off if you buy the S1 then only 1 minutes later the price dropped a little bit. It only means that you have caught today's last bus.

Bitmain always prices the miner at where the miners share a profit with us, though this is not any guaranty, but only intention, only educated guess for the future of mining difficulty. However, it seems that Bitmain's guess is better than those 25%~30% exponential assumption under which the difficulty fly out of the galaxy.