I buy a lot on vinted, partly because it’s cheaper, but also because so many brands made better quality clothes 10-20 years ago. So I buy a lot of vintage M and S/ St Michael, Next (who are crap now), Whistles, Jigsaw, Top Shop, Boden.
I also buy some Me and Em, Maje, Gerard Darel, Hush, Arket, Cos, French Connection, etc - brands I couldn’t afford new.
High street new - M and S, Zara, TU, White stuff and occasional Primark/Peacocks, H and M. I am very careful, it is the sea of polyester and viscose and everything elasticated I don’t like. I am buying a lot of Per Una old maxis and knee length skirts on vinted - lovely cottons, velvets etc with zips / pleats / darts and so on. And lined too.
Fortunately, I have no idea about what is in fashion, and nor do I care!