Old DDR3 ECC is actually cheaper than regular DDR3 RAM, and it generally works with AMD CPUs (who unlike Intel don’t artificially restrict ECC support to their enterprise offerings).
But tbh, ECC is generally not needed and I wouldn’t bother designing a system around it. Use a file system with checksums and regularly scrub the drives and you should not have any major issues with random bit flips that ECC protects against.









































Previously had some good experience with this store selling refurbished hardware: https://www.computerstoreberlin.de/