There are more choices than I thought there would be....
Assuming you are in Hong Kong, here are the prices of some of the cameras that would be fine for you to start learning photography:
http://www.price.com.hk/category.jsp?c=100002&filter=100141&sort=2&page=2
Also, I would suggest that you get the same brand of camera as your friends' because it's easier to share stuff (lens, flash, etc) and it's easier to learn from each other at the start.