Gerry and Sue McGowan have listed their three bedroom Double Bay apartment for 14 November auction.
The 13/38 Bay Street offering is the top floor, north facing penthouse.
It has 490 square metres space in the Ercole Palazzetti-designed complex, The Chancellor.
More than $7 million is being sought by James McCowan from Sydney Sotheby's International Realty. They paid $5 million off the plan in 2003 with 2005 completion by builder, Multiplex. They added three car spaces costing $75,000 each in 2006.
They briefly thought about selling in 2006 when it had $6.25 million hopes.
Spending more time overseas, Gerry McGowan has been associated with the Nasdaq-listed renewable energy group CBD Energy in recent times, having previously been known for his airline entrepreneurship.