Start invite only session with a friend. Get friend inside arena then ask them to start a titan of a job. Take car inside mod shop. Go to sell Click once and press pause on “are you sure you want to sell this vehicle” Then press pause and join friend in titan of a job. Spam X/A then wait on “the session you are trying to join is private” for 4-5 seconds then accept this alert. Once you spawn back down, exit vehicle. To get another car in, walk to the car and press right d pad. From here you can stack cars in the mod shop and merge the cars, to merge: if you start up a stunt race which is outside, then back out. Your friend will see the merge, However, if you re-enter the arena both cars will return back to their slots. Apparently there is a working money glitch with this “Join private friend while on second sell alert in mod shop” Looking for more information if anyone has any ideas. Many thanks.