Aotearoa / New Zealand

I'd like to buy an ex company PC to serve as home server, as an upgrade for my raspberry pi. It should run some selfhosted services like Frigate and Immich, and perhaps Jellyfin. I was thinking to buy an 9th gen Intel or later ex company PC. It should be energy efficient as well.

I tried looking at Trademe but you can't filter on CPU generation. I could search on the exact Intel cpu number but that seems too restrictive. Pbtech is too expensive what I saw. I haven't tried Marketplace but guess that's the same. Some reddit post suggested Dell Optiplex, but no idea how their type numbering works.

Any tips?