That's true, but selling marginally different "models" or "editions" of the same thing, in the hope that people will self-select according to their budget, is c

That's true, but selling marginally different "models" or "editions" of the same thing, in the hope that people will self-select according to their budget, is called market segmentation and is ubiquitous across many different industries. It's not discriminatory, because you allow any customer to buy any product they wish.