I had a quick look on A/T, I think values have been static or even risen over the last 5yrs since I bought mine, most listed are up on the miles & look pretty fair. EG, I nearly bought a clean 2011 with 37k on it which was dealer priced at £22700 back in '18.
If you bought an IS500/RCF I think you're looking at approx £3k PA just to keep it taxed!
That helps our cars for sure.