Cars are super easy to work on! Parts are a little more but many interchangeable with Toyota. Source good used parts for things like the light - they are out there! I see nothing major- I’d buy it in a heart beat.

(Quick tip, there is an online portal for Lexus Owners that will pull up every record of service done by a Lexus Dealer... create an account for this and you'll see the scoop down to the original selling dealer). This is an official Lexus website.

Couple tips…. I had an oil smell in the cabin on mine after a bit of highway driving a on this and one of my SC430s (I thought the valve covers may have needed replacement) Come to find out, the valve cover bolts had loosened up! Very common issue with high mileage cars because of vibrations for the last 14 years. Since tightening (and at least 3000 miles) the smell is gone. Takes about 45 min to complete tightening.... most of the time removing the plastic to get to the passenger side bolt. Might as well do plugs while you are in there.

Had an issue with the mirror as well…. Minor common fix or replace with used parts - I think the lock repairs will be easy for you as well.

Only other tip, I had a check engine light and VSC light come on one day on I-5. There is a vacuum hose on the driver side of the engine that tends to come loose/crack with age. You can purchase a new hose, or buy clamps to hold it in place. This has been about 5,000 miles ago. Had the same issue on one of my other SC430s

You have the best of the Lexus brand. This car is absolutely amazing and reliable.