I would say pins cost like 400-500 yen (might be different for underground idols), so in total it would cost like 6,400-8000 yen
But pins are usually sold as blind bags, so there's a good chance he spent more lol
I can't believe it's been five years already! Excited to see where mangadex will be in the next five years!!:aquadrink:
(Also found this screenshot of mangadex from 2018 :huh:)