The correct question is: Why on earth would you even want to buy a Casio?
Seems like you bought the cam without doing research. If you would even have checked Amazon, a new one costs about USD 160. In other words, you got suckered by marketing.
To me PC/IT show is not a place to buy camera, you are paying more for accessories which are not that important.
You can go other shops like Cathay, TK, MScolour to get at lower price, less the freebies.
There are also very good prices for certain models of cameras, but most of the time these are for unpopular models and older models.