Where do you guys buy clothes

Someone told me I can't buy off of fast fashion (places like amazon) and be scene, so I'm curious to know where you guys buy from? I can never find anything good in thrift stores, and when I go to hot topic in store it never has anything too good either. Most stores just sell modern clothing and trendy stuff. Hot topic online has good stuff but it's hard for me to find certain things without fast fashion because it's 2005 anymore and fashion trends have changed. So where do you guys shop? Also any DIY ideas are helpful. :)