Foreigners come to Singapore not knowing what the market price is.
Hence, they tend to overpay for the houses they buy.
Locals in Singapore however, try their luck by selling to gullible foreigners who are willing to pay for those prices.
Reason is because foreigners mistakenly compare London / Hong Kong prices to Singapore prices.
These foreigners forget 1 tiny little detail - SALARIES IN LONDON AND HONG KONG ARE SUBSTANTIALLY HIGHER THAN IN SINGAPORE.
I myself am thinking of unloading my own unit to a dumb foreigner who is desperate enough to pay for my lifestyle and retirement.

Merry Xmas everyone! It's been a good year, next year will be much harder... When more people start to realize they have overpaid for their units, no one knows what will happen:
$36m Sentosa Cove deal called off?
Today Paper Dec 23, 2010
SINGAPORE - The record $36 million deal for a bungalow at Paradise Island on Sentosa Cove has reportedly been called off.
According to Lianhe Zaobao, the buyer - identified in earlier media reports as Mr Shen Bin, a 31-year-old Chinese national who is a Singapore Permanent Resident - has backed out of the deal and lost about $500,000 in deposit, agent fees, legal fees and procedural fees.
The newspaper said the buyer called off the deal after he realised he paid over the market rate, after reading media reports surrounding the sale. The deal - touted as the priciest in the upscale waterfront housing district - came to light in June, based on caveat records captured by the Urban Redevelopment Authority and was said to have been signed on May 3.
Currently the chief financial officer, Mr Shen Bin is slated to take over his father, Mr Shen Wen Rong's company, Chinese firm Sha Steel.