make an ecommerce website

we need an ecommerce website made, similar to the site zbird dot com. we dont want you to copy this site. this site is to give you example in terms of functionality and layout. we would make modifications on the same. various features such as showing different categories and sub categories of product etc, how products are shown etc are required. the site is to be done in english. we would need a backend functioanality and details of the features that you would provide. if you use a preconfigured platform like zencart etc, please also include that when you are placing your bid. please suggest the best platform to make this. the site should be done within 3 weeks maximum.