Why buy vintage? It's always easier, and often cheaper, to hit up zara.com or nyandcompany.com (which actually does have some really cute dresses right now, just saying), to know that you always have a while to make up your mind, to wait for sales and stay on trend, to replace dresses with dragging hems or splitting seams instead of repairing them, to buy clothes you can throw in the washing machine without worrying they'll be ruined. (I know most people don't treat their nicest clothes that way, just jeans and t-shirts, but I wear dresses as my casual clothes. It's the New Formality!)
I buy vintage for the thrill of the hunt; to keep beautiful clothes out of landfills; to stay in style by staying out of style; because colors make me happy; because older workmanship lasts longer; because I hate disposable fashion; because the conditions under which today's clothes are produced will make you weep, am I'm not just talking about the labor conditions, but the environmental ones as well.
If a gorgeous dress was produced in the last 10 years, but came to you as a hand-me-down, is it still vintage?