These Mini ‘London’ specials are quite good at retaining residual value, but that must always be balanced against what you pay in the first place. For example, car one's list price of £15,000 depreciates 50 per cent in three years, but was bought at a £2500 discount. So it's worth £7500 and has lost the owner £5000. Car two's list price is £17,000 and depreciates 40 per cent in three years, but was bought at no discount. So worth £10,200, but has lost the owner £6800.