Build a Website 1

i want a complete e-commerce website for my business including all modules like shipping charges,product availability according to pin codes etc. the most important that i want in my portal that is i need 2 thing very importantly. firstly,i want my product should be shortlisted according to the city,like when user visit my website first option shown will be to select your city , and according to user selection product list should be show. secondly, i want a seller login portal where my seller can upload the products and its relevant details. this is the 2 important things which i want into my project rest of the things will be same as in e-commerce website,front end should be very attractive and well designed and admin panel will be easy and can handle easily..