I noticed you said selling back to back isn't good. I sold two cars back to back, then waited two hours. Then sold another two cars back to back. I was planning on doing that until I reached 7 cars then would wait 30 hours and repeat that process. Is that safe?1 car per hour /7 cars per 30 hours.
The reason it states 2 cars per 2 hours is that if you sell more than 2 cars in a two hour period You will be flagged by dupe Detection. That is a simplified way of getting that message across without saying too much.