Look out for the Lexus Hybrid Health check.
I've only recently purchased my RC 300h F-Sport after having been researching the IS 300h for a while. The trim levels are confusing to say the least. If you want a particular feature, check and double check that it actually comes with it.
They're fairly hot property due to the attractive low VED and the lack of new cars being sold, so it'll be less about getting a good deal than about gettting a good one. You have to bear in mind that these cars will probably depreciate a lot less than a BMW, so bear that in mind.
A quick browse through AutoTrader:
https://www.autotrader.co.uk/car-details/202108126142640 has quite a lot of paint issues - are you prepared to deal with that? But you can use that to drive the price down IMO.
https://www.autotrader.co.uk/car-details/202102028613858 is from a private seller and has been on sale for a while. Fairly local to me unsure about condition
https://www.autotrader.co.uk/car-details/202108065937587 seemingly okay in South Wales, but the photos aren't good enough to judge. Slightly over your budget.
https://www.autotrader.co.uk/car-details/202108045830647 can be bought for crypto currency and you get Swarovski crystals in your number plate
All I can say is, have a look at some, drive them and always buy on condition.