See also : the Sam Vimes "Boots" theory of socioeconomic unfairness.
There are places where it's true - for example short term rent. And buying in bulk.
Buying used is not one of those places. Buying used is the correct thing to do for someone with low income.
It's starting to lose its meaning unfortunately, as most companies realize you can just charge a lot of money for the cheaply made shit and most consumers just don't have easy options to avoid buying it.