You can start your cheap ecommerce Website Using Wordpress. But you will need integrate it with plugins (say, WP eCommerce plugin).. Templates are easier to find and some premium WP Themes are very cheap and not to mention reliable too..

Here some demo for you to consider, http://demo2.woothemes.com/?name=briefed-commerce

For domain name & hosting, some local Hosting Company offer hosting as low as RM40/annual and domain name is around Rm40, one click installation of Wordpress also a common things nowadays for Whosting provider