Those who already pre-ordered, no need to test the demo unit kua? Either they'll be A) disappointed, and regret their pre-order (especially if paid in full already), B) not disappointed, which will then hype up their eagerness, but if there's not enuf stock for the first batch pre-order ... back to disappointment.
I'm guessing a lot of us secretly pre-ordered on the 28th itself even though officially pre-order starts from today, 30th. Judging from the Gamers Hideout 28th July PS VR post comments (1.5K+ likes), a lot already pre-ordered (including Afdlin Shauki) from GH. So, I went to another authorized focus partner, only 20+ likes,

... straightaway pre-ordered. However, the next day, received a message from them saying that there's no guarantee I'll receive the first batch as well (even tho paid in full, minus any shipping fee), coz more pre-ordered the RM1849 than the RM2029 set ...
Anyway, depends on the allocation from Sony Malaysia (is Play Interactive involved?), I guess each focus partner will receive equal amount of PS VR units (unless GH can use their clout to get more?) ... so, those who really really wanna get their hands on PS VR on 13th October will have to hunt and choose wisely for a authorised seller with less pre-order ...
Else, wait for discounted or lower than retail price from other sellers ... which might be 2nd batch.
Good luck to us (guinea pigs) all ...

Did you inquire any information from GH though, guaranteed stock or something. Right now I'm putting my money on HeavyArms.