PHOTO: Geoff Harris has invested in a new property start-up. Photo: Josh Robenstone

Australian rich lister and co-founder of Flight Centre Geoff Harris has thrown his support – and money – behind a new property start-up offering to buy homes for a guaranteed price.

The company, Brickfloor, guarantees to buy selected properties if they fail to get a better offer during the sales campaign, essentially ensuring the vendor gets a sale.

It launched in Melbourne five months ago and has been making offers to home sellers in Sydney for the past two months. So far, it has made $50 million in offers on properties in the two capitals but the company would not reveal how many properties it now owns.

Mr Harris, who has also invested in live property auction site Gavl and is ranked 111th on Australia’s rich list, said he wanted to become involved in the company because the idea was unique.

“We get companies coming to us all the time, hundreds annually,” Mr Harris told Domain. “The concept was just so novel.