In common with a few of us on here, I have had quite a lot of high price cars and I reckon they all depreciate to about 50% of list price in 3 years. So, on say a £60K RX Premier you are taking a hit of £10K per year. This was the same on my X5s, Range Rovers and a little bit worse on my CL500 (but I purchased it at a big discount). This is the price you pay for being in this market.
Now, the "envy tax" VED is far worse on a car just over the £40K list. For example, an NX F-Sport is listed at just over this point if you specify metallic paint. On the V8 LC you have to factor in the £2000 first year VED for this "high pollution" vehicle. Anyone who has driven behind a black cab might find this a joke.