However, I can tell you that it's legal to drive a car with a "for sale" sign on it in most places. There are usually no specific laws against it.
However, there are some things to keep in mind:
* Safety: Make sure the sign doesn't obstruct your view or interfere with your ability to safely operate the vehicle.
* Appearance: A large, messy, or poorly placed sign can be distracting and potentially dangerous to other drivers.
* Potential theft: A "for sale" sign might attract unwanted attention from people looking to steal your car. Be sure to park in well-lit, secure areas and consider removing the sign when you're not actively trying to sell the vehicle.
It's always a good idea to check your local traffic laws for any specific regulations about displaying signs on vehicles.