PS4 is always in stock and had sold around 67 million units at the end of September. Stock availability isn't really useful unless you also know manufacturing volume and how those are distributed globally.
means there's more supply than demand.
That doesn't mean there isn't high demand.
ie.
Low supply and moderate demand can lead to shortages (i.e. iPhone X)
and high supply and high demand (ie. iPhone 6)
6 will sell more in the same time frames.
This is the first console launch for some time where there are no shortages and that off the back off MS stating 'super high demand'. We've also had over a year of pent up anticipation to help boost the launch...also Christmas is around the corner!
I really think this console has done ok at best, due to the usual shortages at launch we have a situation where people are trying to make a quick buck and also ensure they get a machine...I think the dust will settle very quickly.