You often can't choose though:

https://www.tullverket.se/en/startpage/private/online/shoppi...

> When purchasing via an e-commerce platform, you can sometimes choose which forwarding agent is to send your parcel. However, when Chinese postal services are the forwarding agent, Postnord automatically handles all mail-order parcels in Sweden.

So you end up with a big markup either way - either on the PostNord / Tullverket side, or on the delivery side.