you can consider to look around at CHINESE SHOP, e.g Pacific Hall.
I purchased a Electric air pot over there one month ago and the price is $139. And for the rice cooker... i checked the price is around $130-200... so that you can consider whether need to be purchased in HKG.
If you are not looking for any specific brands or function, it is easy to get a 10-cup rice cooker for about $40. Plus if you buy it here you can get warranty.