Anyone who's selling a house is being urged to do their own research before they start marketing their property.
House-flipping is back in the news, after a house in Auckland was on-sold later the same day for $80,000 more than the first sale.
An investigation of 300 cases by the The Real Estate Agents Authority (REAA) found that only a handful of real estate agents had broken the law or ethical codes.
Home Owners and Buyers Association president John Gray told Mike Hosking that vendors should always do their own research before marketing their homes.
"One of the key parts of our advice is that they should always obtain a registered valuation of their own home and have that in their back pocket, so they know exactly what their house is worth on the market."
He said some savvy investors have made themselves millionaires by taking advantage of the way the system works.
"In many cases they have had a long settlement which has given them the opportunity then to go out and market the home to their contacts, and maybe they are overseas buyers, who are perhaps being - I would say cynically - taken advantage of because of their enthusiasm and desire to buy into the New Zealand market."
LISTEN ABOVE: John Gray speaks to Mike Hosking