Used servers/workstations are likely more reliable than new consumer.
They were very likely kept temperature controlled, have ECC, and are actually known working instead of something like Asus. If I remember correctly, PC mortality is very high the first 6 months, goes down to near zero for 5 years, then starts going back up.
Replace the SSD/hard drive and you are good. You might not even have to do that. I checked the stats on the SSD that came with my used Lenovo workstation and it had like 20 hours on it.