Please recommend platforms to sell/trade “regular” rares/full arts etc

I very casually buy & open packs when I find them at retail price in Japan. Hoping to sell cards I don’t want to keep, to gradually reduce costs of collecting. However the groups I’ve seen on FB seem really intimidating, everyone’s selling seriously, they seem intense lol (rare/expensive cards), with tons of stock. I would also love to trade the ones I don’t want for cards I like. I see there’s B/S/T on the tg group, but aside from this and carousell (not a fan of the platform), could u guys suggest other casual (local) communities or FB groups where I can sell or trade in a relaxed manner please? And also please remove this post if it’s not allowed!