So you saying if I take it to LSC and change the plates to custom ones and sell I get flagged even if I sell with different custom plates. So I need to reduce my cars but the original should have custom plate. Doing the MOC/Penthouse glitch.Do they have duplicate plates or are the plates all different?
If they are different you are good to go.
If they are all the same your plates will most likely be locked and you will need to dupe cars over them. Selling cars with Duplicate plates will trigger a daily sales limit.