the only time i che.. err trade, is when I need a car for a certain race and i'm broke, and fully mod it then trade, that way, i only buy retail value, instead of buying all the parts, and once again i know this is cheating and not up to standards.. i also do it to get drift cars, i get everypart possible so i can fully tune for certain tracks, but i don't find this to be cheating because there not much of racers.