Check the prices on Ebay before laughing too loudly....lol
Even for your computer. Kaypro? Heathkit?

Gunner

A Xerox 820 also called a "Big Board", bought the bare board surplus and
soldered all the itty-bitties. I was hooked on text adventures like "Zork"
....(XYZZY-the secret password) I used the tube tester in college to repair
TVs cheap for students and make beer and film money.