I’m in Hilversum but new, unopened drives will be out of my price range. I’m only capable of sub €50 purchases at the moment

Any recommendations?

€356 excluding USA to EU shipping… Oof!

I reckon I need about 10TB of RAID 1 for a decent Jellyfin media server

Also true for me

True, but it’ll be nice to have enough space to let the future arr stack I plan on spinning up, roam free