Dear Employer!
I'm bidding on this project, because I understand your requirements properly, according to my understanding your require the following:
1) A complete custom designed website, which should include, product show case, shopping cart, user management, payment management
2) Interactive and appealing design
3) Most probably PHP and mysql technology.
I have more than 9 years experience now, and during this I have developed many websites and many of them were having shopping carts. I believe in complete satisfaction of client, hence provide after sales service too in deploying or moving website from one server to other or bug fixing.
Hope to hear from you soon.
Regards.