In Italy $10 / pizza is a medium-high price already.

Generally, €10 for a pizza is the average one in EU. Only in UK people is prone to pay an average of 18 pounds for it, which is sick.

Depends.

A small basic pizza is $8-$10 here. Domino's always has a deal where you can get 2 medium pizzas for $6/each. (used to be $5).

But if you're buying larger, specialty pizzas without coupons/promotions then you're going to be paying more like $20/pizza.

My pizzas are usually small and plain, so I'm closer to the $10 mark.

In the SF Bay Area a 14" pizza from Round Table or better is $20+. Trash pizza is still $5 each or whatever, yes, but where do those savings come from? How do they maintain the price when flour is in such short supply?

Yeah. Even in Western PA a large will set you back $20.