This is a genuine AIBU by the way!
Teenage DS15. Very focused on fashion, compared to how I was at his age, spending time on ebay etc looking for "stuff". Currently he's staking out a winter 'parka'
. Most of his peers seem pretty similar.
At his age in the late 70s, I bought a few things from Top Shop or Chelsea Girl, but really had very little by comparison.
I think its nice to have some decent clothes, and its good to take pride in your appearance, but it all seems a bit OTT to me.