I have ecommerce website that requires to be improved

General information for the website: I sell general second hand products for resale
Kind of development: Customization of existing website
Description of every page/module: I have website that I have developed myself from ipage.com
Description of requirements/features: I am looking for a website that can sell my products online instead of selling on ebay. I would like customers to be able to pat by paypal.
I sell second hand products and some end of line items so I would like to add / remove products and stock quantity myself

I would like someone to design and tweak existing.

I will give access whilst in dev
Payment methods: Credit Card, Paypal
Extra notes: