I have tried to work on a basis of £1,000 a year depreciation for quite a while now. My worst (for depreciation) car worked out at £1600 a year. As a few of you are on here, I am a little addicted to AutoTrader. The second-hand cost of Lexus cars seems to have shot up. A six year old RX450h with around 40,000 miles is nearly £24,000. That WOULD depreciate quite quickly me thinks! Supply and demand - take it or leave it.