Depends on what you’re looking for, but for server use even a bit older hardware is just fine. My proxmox server has Xeon 2620v3 CPU and it’s plenty for my needs. For storage I went with SAS-controller, controllers are relatively cheap and if you happen to have a friend in some IT department you might get lucky when they replace hardware. RAM is a pain in the rear, but 8GB DDR4 rdimms work still just fine (if someone is interested I have few around)
Personally I wouldn’t pay current prices for new hardware, specially if it’s for hosting. A bit older, but server rated, components give a lot more value for your money.


For whatever reason ISPs tend (at least in here) to be pretty bad at keeping their DNS services up and running and that could cause issues you’re having. Easy test is to switch your laptop DNS servers to cloudflare (1.1.1.1, 1.0.0.1) or opendns (208.67.222.222, 208.67.220.220) and see if the problem goes away. Or even faster by doing single queries from terminal, like ‘dig a google.com @1.1.1.1’.
If that helps you can change your router WAN DNS server to something than what operator offers you via DHCP. I personally use opendns servers, but cloudflare or google (8.8.8.8, 8.8.4.4) are common pretty decent choices too.