Maybe you can justify selling an ebook for 800$ because when using it the customer will recover their investment.
What if your hospital/doctor/insurance starts doing that? After all, wouldn't be a good investment to not be DEAD or suffering? Wouldn't you give them a shit load of money for all that value they created for you?
It's a bullshit justification for milking people out of their money.
I prefer the Amazon/walmart approach. Commoditize aggressively and keep the competition away by having low profit margins. Make your money off volume instead of gouging a small pool of customers.
The same applies to this Hollywood crap. They are price gouging with licensing deals, geo-location restrictions, delayed releases etc. Then wonder why aren't enough people willing to pay us what we ask them to? Fuck off.