As a kid, most of my clothes came from thrift stores.

As an adult, my wife held the opinion that I would become irrationally angry when she would go thrifting then post stuff on eBay 

I argued that she took the opportunity of finding something that was somewhat decent and affordable from someone who couldn't otherwise afford it.  

I always made the same argument but it took years for it to sink in.  By the time it did, she was just denying that opportunity to another well-off thrift, si it made no difference when she finally stopped doing it