Looking at a 2008 SLK 350 (new, never titled) to help a friend with a purchase and trying to figure out what the actual value may be to get the best price. It's for sale from an authorized dealer in SoCal. Any thoughts appreciated. Thanks!

They are asking $42,900 and the specs and original price are below:

2008 SLK350 $49,200
650 Arctic White
801 Black Leather
P01 P01: Premium I Package: SIRIUS Satellite $2,595
R35 Std. 10-Spoke 17" Wheel
280 Leather Str Wheel/Shift ****
535 Radio Audio 20 w/Single CD
819 6-Disc CD Changer $450

SUBTOTAL $52,245
DESTINATION & DELIVERY $775
TOTAL $53,020