While I agree they are as common as corn in Iowa, Mona Lisa's sell like hotcakes if you do it right.
Case in point:
I have sold 20+ S15's sporting the CWest body and appropriate paint scheme. The last 3 I sold have gone for 1.2+ million CR. Before you doubt, I must add they are U999 class cars, crammed with upgrades. I race every one of them enough to make it to Lvl 5 (only 6 races now, at 20K a race), which also jacks the value. There are small discrepencies between the movie car and my design, only limited by the constraints of the editor/parts shop. Regardless, there are poor souls who drool over them and buy them out at the 1.2+ million well before the auction is up. May there be mercy on there idiot souls.
You may hate me because I continue to provide this one car "ad infinitum" to the masses, but can you blame me when 20 minutes and 140K can net me almost ten times that in the Auction House??
GT: Specialist 068