I had a lexus ls400 a few years ago, loved it fantastic car and a brute of an engine, smoth refined and very quite, ride was very wallowy when i first got it and, as the shocks were shot but new shockers sorted that. One thing to watch out for is the dash lights they can fail to light when the car is cold but as the temp starts to rise in the car they flicker into life, this is cured by replacing a couple of capacitors on the rear of the dash pcb, also the climate control lcd start to go black and clear as the temp rises in the cabin, these are common problems for the early cars and parts are horrendous from toyota/lexus.
Mine as a 93 k plate car and i still have some new parts for it in the garage so if you need any then get in touch. also if you need any other info please pm me.
I would have another tomorow if one came my way.