selling method

This is a little method i came up with myself when the game was still in beta, it still works, and there's 1 easy way to do it, and 1 hard way to do it (that gets easy eventually)

For either method, you either need 2 iDevices, or a trust worthy friend willing to help you transfer the moneys/cars
if you want the easy method, you must be jailbroken! you will need the weight hack found in VIP

Easy Method
Apply the weight hack to your game.
On your SPARE iDevice, start a new account
The best cars to get are still to be determined for the most cash flow BUT i usually start with the CIVIC
using the weight hack, race the single player races
As you move up, grab the different cars. Race all the way until you beat R Class
Go back to your garage, and sell all the cars EXCEPT the civic to the system
you should have somewhere around 750,000-850,000, and 89 gems
Use the gems to either get a car thats on sale or the civic type r
Now race that cash to your main and your three quarters of a million richer!
(SEE THE CONTINUATION AFTER THE HARD METHOD TO REPEAT THIS)

Hard Method (no jailbreak)
Have 1 car for each class that you KNOW will win the single player races easily. Transfer those cars to your SPARE iDevice on a new account (NOTE you will need to beat D Class to be able to pink slip these cars over, so it takes time).
Next, use these cars to win the single player races, and sell the CARS YOU WIN (not your actual race cars) to the system
from there, you should have about 550-700 thousand bucks


HOW TO REPEAT THESE METHODS on the same device
You simply need to make sure you have Racing Rivals ipa backed up either through iTunes or some other method.
Once that's done, DELETE IT FROM YOUR iDevice!
Disconnect any wifi connections and cellular data on the iDevice, and open up your game center.
When you do this, it will be in OFFLINE MODE and delete the game save for Racing Rivals
Re-Install Racing Rivals from your itunes backup, and reconnect your wifi/cell data
Run the app and you'll get a pop up with 2 buttons at the bottom.
Click "Keep Playing" And it will start you over from scratch

all in all this is a long work around but it does make you a lot of money in a good amount of time. i've gotten this method down to about 825,000 and hour