Prices have jumped considerably, but basically anything on Server Auction is good https://www.hetzner.com/sb/

I pay 60/month for 50 TB with a 10 year old intel xenon.

If you want a cheaper alternative, maybe look into ServaRica. That's where I run my Immich instance for my wife and me. 4TB for $11 per month. The servers (cpus) are not super fast, but fast enough for me.