^ It's a matter of availability. You can find them relatively easy online, yes, but if you go down the high street retailer and try to buy one in a store (still the most convenient option for a lot of us) then everything in their
shop window will be region locked (and some brands don't have the ability to unlock them).
The models that do
have the ability are either no-name brands of dubious quality to start with, or else they've got a prohibitively high price point.