Ruebedo,
i was at one time in the same frame of mind as yourself with regard to mileage of csl's and the variables on mileage against purchase and subsequent re-sale. Shimmy's advice on the why's and wherefore's of buying is bang on. i don't know shimmy but he certainly knows his stuff.
I have recently bought csl number 3!! The last 2 cars i owned were very low mileage in comparison to the available cars today.
Condition is everything... My current csl has 50k miles with warranty and has almost twice the mileage of the first 2 cars added together!! However my current car is in better condition allround than the previous 2. This is simply down to the previous owners and having looked @ dealer csl's with much lower miles a forum csl with a genuine history(ideally the previous owners will know and more than likely be forum members) is the way forward. Best of luck with the hunting.
