Good job keep his damnn car!! He had bad intentions from the get go, so don't feel sry for his lame azz. You did right thing, had to defend yourself, so now his car is yours.. Infact, message him now and offer it back for 1.2 mil, or insist that he throw in another car for trying to scam you.
I have a couple. Check them out here: http://racingrivalsforum.ciegames.com/forum/the-neighborhood/unsupported-player-trades-sales/1161103-honda-turf-event-sale