The 7 must-know numbers of the week, including the possible top Melbourne sale of the year

The whispered sale price of a Toorak home built by Sir Macpherson "Mac" Robertson, of MacRobertson's Chocolates fame. It was sold by funds manager Ron Dewhurst, and it could be the highest Melbourne sale price of the year.

The number of portions Sydney entrepreneur Drew Muirhead has split his unsold five-bedroom Cottage Point waterfront on Sydney's Pittwater into. It has been given a nominal $7.8 million value, with each portion listed in $650,000 part ownership shares, while he would retain two himself. 

The approximate sale price for Jobe Watson's Albert Park investment property, which recently sold. The Richardson Street was purchased for $930,000 in December 2007, having previously traded at $880,000 in mid-2007.

The block size of Sydney's smallest home. Agents are selling a 45-square-metre house in Paddington and a Darlinghurst house on about 40 square metres.

The amount arts philanthropists Simon and Catriona Mordant made on the sale of their Darling Point penthouse to writer Melanie Hershon, the daughter of the late ragtrader Michael Hershon. It was sold two months ago after seven months on the market.

The percentage of the Emporium Melbourne retail complex that is expected to be leased upon its completion next year. Goldman Sachs Australia senior REIT analyst Simon Wheatley expects the retail development to be 85% leased on completion, having previously forecast it to be fully leased.

The value of pre-sales achieved in Juniper Group's Gold Coast development Soul by 2008. Many buyers have been unable or unwilling to settle. Receivers have been appointed to manage the development.