Its just that car.... that one has been abused... heavily abused. Sad really. This car is a disgrace to Lexus.
I have a 1991 Lexus LS400 with 216K miles and the interior is still like new and 100% rattle free. My old 1990 Lexus LS400 had 260K and the interior was like new - it too, no rattles.
Also too, the SC models were not nearly as nice/well built as the LS models. The LS seemed to have higher quality interior materials than the SC, which was strange, because even Camry models during those years were built with very high quality materials.
My gosh... check out this one! It makes mine look like showroom! They say "clean"! Are they insane?
http://dallas.craigslist.org/dal/ctd/905422639.html
Here is a nice example....
http://dallas.craigslist.org/dal/cto/906171063.html