I've been buying vintage most of my adult life, partly because of economics but also because it's more fun!
Another reason I like to buy at flea markets, estate sales, antique stores, vintage stores, garage sales, etc.: often I can actually find something that wasn't made in China! Some items were even made in the USA! Then there's the damage caused by the clothing industry to the environment and the Third World. So maybe if enough of us did it, we could actually save the world.