Hunter residents should watch where they park their cars when privately selling them on the side of the road.

Cars are often being parked illegally by sellers to get exposure and to cut out the middle man to make extra cash.

However, concerns have sparked with the tactic causing problems for traffic and pedestrians.

Private sellers and professional dealers are also resorting to this tactic to avoid taxes and government regulation, often using many locations and creating potential hazards in the process.

The Lake Macquarie area has become a hotspot for road sales, with four locations in the Belmont area and the old Belmont Airport becoming a virtual car yard on weekends.

Rangers are beginning to crackdown on roadside dealers with some residents receiving fines.