Hi, It is all about public perception, or more accurately, the predominantly male motorists who 'may' consider a lexus GS300 as there next purchase....I have been a part-time motor trader (and fulltime car salesman) on and of for 20 yrs.....I am on my 5th GS300 sport (three MK 1's & now my 2nd MK 2 )
Everytime i come to sell one, they certainly take some shifting!! and ultimately, usually sell on 'Price', the British car buyer is not usually a very descerning one, many being transfixed on the mainstream brands, so much so the GS300 never appears on the radar!
Another major factor is the percieved running/Maintainance costs (we all know they are generally cheap to run. aside from the fuel for the 2JZ-GE engine) mainly due to their reliability!...others see it as a potential Moneypit.
Most buyers will be 30 somethings maybe 40's, who have a desire to own a cheap Mid-size exec' and see the benefits (Kudos) this brings but usually make a B line for BMW's or the like, before stumbeling upon the GS....and even then, the styling, particularly of the MK 2 is not to everyones taste!
Personally, after owning Many 'Executive sporting saloons' , I feel the only thing that comes close to a MK 2 GS300 Sport is a BMW E39 528/530i......and there lies another problem !...........I prefer the Lexus but only because it is different !
..Most people don't like to be different !!!!