What!
You mean Amazon might be doing something naughty?
Well, that's never ever happened before, has it?!
/s
Amazon has been accused of pressuring wholesalers into selling goods at inflated prices on rival marketplaces through anticompetitve agreements, thus unfairly cementing its market dominance. The allegations were made in an amended antitrust complaint that was first filed in May by Washington DC’s Attorney General Karl Racine …
That depends, lots of brands set their own store price as the indicative market price which some stores undercut and others don't (larger chains will sell at exactly the same price point).
It's also a balancing act between low price and wide distribution, if brands set their own store prices too low, where's the margin other stores need to justify selling that brand?