You do? Heatsink and case were totally optional in my experience (or a case would make thermals worse). Power supply maybe, if your phone charger did not alrea

You do? Heatsink and case were totally optional in my experience (or a case would make thermals worse). Power supply maybe, if your phone charger did not already work. SD Card or flashdrive; I have many of these lying around. There is something to be said for having keyboard, pointing device and screen included with a used laptop, but the stuff you list it seems you just don't actually need.