>80% of the clothes I wear are second hand, bought on eBay, Grailed and Americana Pipedream. eBay has everything you could want, and much better seller/buyer protections than Grailed. Grailed is tolerable for me since the owners sold out hard and made questionable changes, yet I still browse the feed almost every other day and regularly find great deals on vintage CDG and Margiela, as well as workwear. Americana Pipedream has to be my favorite place to shop right now. Local to me, owned by cool people with a massive following on social media, selling cool vintage military surplus stuff. Click that link and get you some!