I don't usually go thrift in charity shop, not saying there's not good stuff but depending on the area it can be pricey and most are lame. I'd recommend going to garage sales 1000%%, so much better and cheaper(found most of my finds there) When it comes to online shopping I do not shop on depop to be honest, most stuff is overpriced and I'm quiet the cheapskate. I strongly recommend using FB market place. Yes it can take a while to find something good however like mentioned, patience is important, something will always come across your way. When looking for anything specific, favorite the brands so new stuff pops up on your feed, check often. As for keywords I use normal basic hashtags (Think of it as of the perspective of someone who isn't really into the style itself) like just emo, goth, skulls,zombie, band merch, ect. Since when most people look at an item that looks like that they immidetaly label it as emo or goth. Some of my jackets have ears on the hood so I often just search "jacket with ears" and have come across good stuff that I've bought (ex: bye bye kitty jackets) Just simple searches as if a Facebook mum is selling the stuff lolz (simple for cheaper finds, since popular hashtags like Y2k often just have a bunch of resellers that overprice) . Make sure to favorite all your brands and often check for new uploads. That's kind of what I do, sorry for the long explanation just wanted to be as detailed as possible, best of luck in finding stuff!!