Or you could buy a PC with a Celeron CPU, which was obsolete way before launch.
Then one day the hard drive appeared to die. I eventually realised the issue was located around the 1.5gb mark, so I recreated my Linux partitions after 2gb and it worked fine for the rest of the year.
Chat gpt came up with it: https://chatgpt.com/share/6a9ae2c9-1910-83ed-9591-1b30f8834c...
I assume it hasn't had time to read my post yet.
I also believe you could get motherboards that supported 2 Celeron chips. I have no idea how effective/useful it was, but it was certainly a cheap/interesting way to get multiple CPU's.