What changed Mr Aird? Please explain

There is a staggering $250 million difference between the rough valuation and the amount paid by the Retirement Benefit Fund (RBF) and Gateway Consortium for Hobart Airport.
In June last year Treasurer Michael Aird put the valuation in the $40m-plus ballpark:
The Age June 9, 2007 – 8:04PM
Hobart airport worth $40m, says Aird
TASMANIA”S Treasurer Michael Aird has hinted the government sale of Hobart International Airport should fetch upwards of $40 million to help fund costly infrastructure projects. Mr Aird told ABC TV a figure of $40 million would be “a bit light on” as he prepares to off-load two other state owned assets, the Printing Authority of Tasmania and the Southern Regional Cemetery Trust, announced in Thursday’s budget. Money from the sales will be used for planning of the new Royal Hobart Hospital, and on the Brighton Transport Hub and water and irrigation systems statewide. Read more here
Today, Saturday, November 22, Mr Aird says: “I challenge Mr Booth, or anyone else, to produce any evidence to support his completely false claim that I said the Government expected to get $40 million from the Hobart Airport sale.” And The Retirement Benefits Fund Board has angrily rebutted allegations it used public servants’ superannuation to boost the sale price and provide the Government with cash for major infrastructure projects. Read more here
Why did Mr Aird originally put the valuation in the $40 million-plus ballpark. There’s still a massive difference to the actual sale price. Please explain, Mr Aird. Read more, COMMENT HERE