Mighty Ape in NZ probably only ordered 3 PSVRs for their first shipment. 
But seriously, I bet most online retailers placed very modest first shipment orders because who wants to take a risk on having a whole lot of VR stock sitting around waiting to be sold. Still, being sold out with low first shipment orders is a helluva lot better than not being sold out with low first shipment orders.
This is also a reflection of coming in at a substantially lower price. When people have been sensitised to a high price, the surprise at a much lower price stimulates buying behaviour, even if the decision is reversed later.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix
