The 5 must-know numbers of the working week, starting with Melbourne auctions on grand final day

The number of Melbourne vendors who are bringing their homes to auction on grand final day. The weekend before there are about 700 auctions scheduled, according to APM, and 500 on the following weekend.

The rental vacancy rate for Melbourne shopping strip Bridge Road. This is up from 2.9% just two years ago.

The shortfall of homes in Sydney for the first quarter of 2012, according to the McKell Institute. The greatest concentration of houses is required in the south-west and the north-west, where the target is for 169,000 homes to be built by 2036, says the think-tank. “Councils across the city need to flatly reject NIMBYism and accept that if they don’t approve more dwellings and get the construction sector pumping, our housing affordability crisis will get out of control,” says McKell.

The price paid by a Chinese investor for the premises of St Katherine's, the much-lauded Kew restaurant of MasterChef's George Calombaris and his business associate Shane Dalia.

The price that self-betterment guru Siimon Reynolds has secured for his Double Bay bachelor pad. The two-bedroom apartment was last traded for $788,000 in 1997.