I guess nobody else has noticed the tube MANUFACTURER, New Sensor / EH, is setting even higher prices than Viva tubes on their own web store. But I guess it’s just fun to bash Viva tubes for some reason? They’re doing you a favor, if you really need (not for spares or OCD) a power tube that’s out of stock elsewhere. They had to price high enough to discourage hoarders and scalpers.
The big power tubes is where the crunch is, because there’s no vintage alternatives to fill the void. The vintage small tubes should still last for many years. It’s bad to need KT120 or KT150 right now, with Gold Lion KT88 close behind. KT170 is also bad to need, but at least there aren't a lot of amps out there that use it.