This is already in the Important: ON SCAMMING AND ITS CONSEQUENCES sticky, but it bears repeating:
You will NOT offer cash or ask for cash for ANY trade.
No cash, ergo:
-No Credit card information or billing;
-No PayPal;
-No Bank Transfers;
-No Checks;
-NO little green/yellow/red/blue notes of paper with denominations written on them.
Please report any member soliciting or offering real cash for virtual cars. Those offering cash will be given a warning. Those asking for cash will get a whopper of an infraction.
We also strongly recommend that you do not share your PSN account details with anyone.
You have been warned.
Thank you.
Better change that part about paypal...