Chromebooks  have arrived in Singapore and for some reasons, they are only on sale at Courts  and not elsewhere like Challenger, Harvey Norman or Best Denki. I guess Courts got the exclusivity rights for the time being.
For the HP Pavilion Chromebook, you can get it from HP Online Store  as well.
In the US, HP Pavilion Chromebook and Samsung Chromebook are retailing for US$249 (S$315) and Acer C7 Chromebook is retailing for US$199 (S$252). I think if you include shipping charges to Singapore from freight forwarder like comGateway , it is still cheaper to get from the US if you don’t need the warranty.
If you have the budget, I recommend waiting for the Chromebook Pixel  (WiFi: US$1,299/S$1642, LTE: US$1,449/S$1832).
Chromebooks At Courts Singapore
Source: Hardware Zone