Because, says Oliver Bennett, for all its perks, this new property sector is just too selfish Swish blue chairs sit below naked light-bulbs, swinging from a fashionably-distressed industrial ceiling.
These range from evaluating the causes of change in biodiversity stock and function, forecasting floods, identifying an addressing the impacts of pollution and climate change, to safeguarding UK soils and carbon stocks.
BBC London found the e-mail addresses of the scammers originated in Nigeria.
A spokesman for Gumtree said it was working with the money transfer agency Western Union to prevent the fraud.
Their work also includes developing decision support tools for the sustainable intensification of agriculture and the management of ecosystem services and water resources.
Lin Dong asked Alexandra to send a payment of 1,350 through Western Union, not to him, but to a trusted friend or relative of her choice.
As in the scam which hit the Sheppard sisters, they wanted 1,350 to be forwarded through Western Union and then to be sent a scan of the receipt.
'Suspicious activity' But BBC London checked the origin of the e-mails and found they were all sent from Lagos, Nigeria.
He then requested a scanned copy of the transfer payment receipt so that he could verify that she had the available funds.
Some time afterwards, a fraudster using fake identification, pretending to be Zaire Sheppard, walked into a Western Union office with the scanned receipt and took the money.
The survey, conducted by Galaxy, found a staggering 83 per cent of Australians are expected to sell their unwanted gifts online.