Stop giving the guy a hard time. He is NOT a manufacturer but clearly a reseller. If anyone thinks they are a scam, simply do not buy from them, period. I am sure their prices will put off a lot of people, as the very same rigs can be got from the manufacturers cheaper (albeit subject to taxes).
But honestly, would any "respected" member of this forum asking for a rig to be sent before paying actually pay for it if it were sent (at their prices)? The answer will be a convoluted one, arguing price point, shipping et al and ending with NO. So why do you ask if you know you can not (and will not) pay for it? Cut the guy some slack.
If I recall he refuses escrow. My thoughts are new person refuses escrow and wants btc payment is asking to be reamed and asked to prove he or she is real.