The PlayStation Portal, which launched on November 15, has already sold out in the UK and the US.
As noted by Eurogamer, it seems as though scalpers may have hoarded some of the supply as there are already listings for the device (which retails at £199) on Ebay for between £200 t0 £290, with some reaching over £300.
The UK PlayStation Direct store says the PlayStation Portal is "currently unavailable" and to check back for more information on November 22, while the US store suggests early December for an update on when to expect more stock.
source https://www.gamesindustry.biz/playstation-portal-has-sold-out-two-days-after-launch
