Hi and welcome to LOC.
Do a lot of research on this car. Read through this forum regarding head gaskets, DPF filter...That's all I'm saying :)
The 1 thing you do need to be aware of, and I'm not slating the car or trying to upset the diesel owners but Lexus extended the warranty to 7 years, 110k miles because of a design fault with the head gasket. and to be covered by this the car has to have a Full Lexus Service History.
Good luck with your purchase.