I'm not at all a minimalist, even though I'm well aware that the fashion industry is one of the biggest polluters, but what can I say, I love clothes.
It took me a while to get into second-hand, because for me it was necessarily old, damaged, out-of-fashion stuff that people were getting rid of. And then my closet was overflowing with clothes I no longer wore (sometimes new, *rolls eyes emoji*) so I told myself I had to get rid of them in a smart way. There are consignment stores (but the only one in my town closed), yard sales – honestly, I only have about ten items so... that leaves the internet. And there's a lot of choice there: Ebay, Vide-Dressing, Vinted... (I personally chose Vinted for its ease of use).
Anyway, I realize I'm not alone in clearing out my closets and that we are all participating in a kind of circular economy. By giving a second life to an object whose obsolescence is programmed, I tell myself that, at my small level, I am short-circuiting the big fast fashion industry. Please note, I will continue to buy new because I love clothes and businesses need to survive (you know what I mean), but I think it's a good alternative to all these giants, and most importantly, you can find organic cotton and fair trade clothes on it.
So yes, second-hand is fashionable, but it mainly responds to the needs of a changing society. We are trying to consume differently. Moreover, second-hand has always existed; today it is just becoming more democratic!
Some figures: 60% of used clothes in France collected in 2016 (source ConsoGlobe) 48% of French people donate their clothes to charities (source EcoTC) 91.2% of clothes collected in 2013 were revalued (source EcoTC)