Running shoes for instance: when I was last buying a pair of trail trainers the brightly coloured version of the shoe I currently prefer was being offered considerably cheaper than the all-black-except-high-vis-strips version. This was from the same sellers too, it wasn't due to the listing offering items from multiple outlets as is sometimes the case.
I would have preferred the darker version but I'm perfectly happy not to care about colour to save a bit of cash to spend on something else, but if I had paid the extra, as someone buying a fashion item to match an overall look might well do, and not got that version anyway I'd be expecting a cost-free replacement.
Search ps4 dual shock controller on walmart.com.
Beats headphones
Apparel.
Etc