Dude, here is how it works. You post what you are looking for on the Marketplace forum under "Wanted". When you get a response the FR means that you you send a Friend Request to the Playstation Network ID of the the responder. If your responder wants something in return they will let you know. If a responder says they will "donate", that car means they are willing to send you the car as a gift.
Hope this helps
