Midnight Club: Los Angeles Hints for PlayStation 3
Also on: Xbox 360
To get a locked car all you need to do is have enough money to be able to trade in your car to equal the amount or more than the amount and you will be able to get that car
(I got the Dub Edition Mercedes Benz by doing this)
WARNING: This will subtract $1,000 when you win a race
Also on: Xbox 360, check out those pages for more help with this game.