Thanks Bitmain for your reply,

Thankyou for answering my question and editing your post as I was editing my question. Much appreciated.

One last thing, I haven't had any problems yet, all ive had is questions asked that were hard to get an answer on this, your bitcointalk topic.
Also, your edited comment states that the current price of BTC for 2 x S3s is less than $1k, but this may not be the same by the 2 weeks when you actually ship the units. As your pricing is BTC locked, is there any chance you can drop the price by then to ensure the price is less than $1K at the shipping date.