God knows.
Over 16 years probably north of £10k?
Had: Performa 630, Powermacs 6100, 7200, 7600, 8600, G3 Beige, B&W G3, G4 MDD 867 DP, iBook G4, MacBook Pro Mid-2007, iPhone Original, 3G (briefly), 3GS.
Currently: Mac Pro 2009, MacBook Pro Early 2010, iPhone 4, Airport Extreme.
There is more that I've used at home, but I can't remember what they are.