I recently picked up a 13 year old dell inspiron to run my instance of home assistant and Plex. It was an upgrade from a shitty old Linux laptop that was literally falling apart. All I had to do was add ram (it only had 6gb and it wasn’t stable, so I maxed it out with 16gb) and I swapped the old slow HDD for a crucial SATA SSD and it’s been perfect. It probably pulls more wattage than necessary but it’s exactly what I need for now.