Anybody considering investment in Vietnam should read this article in the Asia Times from 2006.
Asia Times Online :: Southeast Asia news - Vietnam's property market boils over
CB Ellis will report that it is an excellent market in which to invest because they are practically the only agents selling it and have exclusive contracts with the majority of developments to prevent any other agent selling there.
If the market was overpriced two years ago, you can bl**dy well be certain that it is now!
Happy hunting!
Andy