I miscounted and said 6 when I really have 8:
Macintosh 512K
Macintosh Plus
Macintosh LCII
PowerMacintosh 7500/100
PowerMacintosh 7300/200
PowerMacintosh 7300/200
PowerMacintosh G3/300 MiniTower (upgraded to 500 MHz)
iMac DV 400 MHz
All of them are fully functional except one of the...