Might not be what you had in mind, but NixOS “kind-of” ticks all your boxes.
For me NixOS is a build your own distro more so than Arch could ever be.
My config covers antiquated meme worthy notebooks with 4gb ram, desktop with an ultra wide monitor and dedicated graphics, two headless servers running services, containers, transcoding video / cctv; aaand my daily driver laptop.
As far as 2nd hand laptop are concerned - it’s very location specific. My neck of the woods it’s buy online or hope some locally has marked something at a reasonable price.
80s’re