I built my home server in 2013 and it is still going strong. It is based around an ASRock E350M1 with integrated AMD E350 dual-core processor [0].
It sports 4GB RAM an old 64 GB SSD for the operating system (debian) and three 2 TB HDDs in a btrfs RAID1 array giving ~3TB of usable space which is plenty for my own needs.
It runs the following services:
- DNS server (unbound + custom domain filtering)
- Syncthing
- OpenVPN client & server
- PostgreSQL + lighttpd + PHP for various small websites
- Samba & NFS
- Transmission (for linux distros of course)