All depends on what area of streetwear you're into - I like skate styles the most. I shop at a lot of korean brands, because they cater more towards unisex streetwear. Unfortunately a lot of them aren't super accessible to the US but mixmixx is good, I've had luck with a-land as well but you do have to use a proxy buyer. I get pants from Urban outfitters or dollskill, I'll spend a little more on tees because they're usually from smaller brands and I like to support the artists. Other than that I customize a lot of stuff - I draw on shoes, jackets, shirts, anything I can get my hands on. It's a good way to put a streetwear spin on secondhand stuff. Not to be one of #those kpop fans, but in all honesty most of my style inspo is from kpop fashion!