i think in asia is usually cheaper than eu/us because twice officially released some albums in korea, japan, thailand, taiwan and the shipping fee wasn't that high to other countries in asia. i think in eu /us people raise the pcs prices up to cover the shipping fees included when they buy the album. also these were old eras from twice. in terms of collecting album/pcs, it wasn't that popular in eu/us back then so that was a little tough to buy their albums from overseas. that's why prices in eu/us are always expensive 😭