ev,v.42 (former account)protip: don't buy two hard drives from the exact same batch ever
protip2: if you have a valuable device, say, a sinclair pc-20 and a crappy monitor, put a AC voltmetre between the shielding of both devices, because CMOS chips don't like high alternative voltages going through them
protip3: if you see a bunch of 1980s computer stuff for five bucks get it, make a scene to your guardian if necessary