Sara Naismith made her fortune in dubious overseas property deals. She started by buying beach front land along the Black Sea coast once the Soviet Union crumbled, next it was tendering for re-building programmes in China after the earthquake. She appears in "Return of the Prodigal".
She left China once it was discovered she was bribing officials to avoid building regulations. She thinks the recession in Europe means she can make a fortune on the money markets. She has an assistant called Aaron who has been with her since September 2008 and has a degree in Business Studies.
Note: Naismith and Aaron were actually future team members Emma and Sean in disguise as arranged by Albert to con Mickey and Ash, whilst Mickey and Ash were conning them. The four became a team at the end of the episode.