They even revealed the gender of their baby on the show, cutting open a cake replica of the Gatwick apartment block provided by host Scott Cam.
Now expecting a little boy, Hayden and Sara are already parents to a little girl.
With the baby news out of the way, it was then auction time. The opening bid was $2,500,000 before it slowly got to $2,575,000.
It then well and truly kicked off, with the final bid a huge $3,020,000, with Sara and Hayden winning a huge profit of $545,000!
The couple ended up making the most on the night, meaning they won the competition and took home $645,000.