Take it to your favorite Toyota/Lexus mechanic first to have it thouroghly inspected and get his blessing ,rejection and/or list of problems before negotiations. It's a 20 year old car and is due for a timing belt replacement.  Time still takes it's toll even on the best cared for cars.

My Boss used to have one that I drove now and then, sure did drive nice. Big bumps that I would really feel in my old 4Runner, that LS would just glide over.

As was mentioned by @jdavidm it is 20 years old, proceed with caution.

I wouldn't think that's a bad deal from my point of view. But if you do buy it, be prepared for all the maintenance you would need to throw your money in to have this vehicle hold up overtime. Those V8s in that Lexus are strong as heck. But certain things like changing the belt and the starter, etc. could possibly be a real pain to take care of. So again, be prepared if you do wanna buy this. If you're not, you'll be facing the endless money pit without even knowing that you're facing it😆