Ecommerce Web Site (Dozen Items)

Dear Perspective Developer, I own a silk screening company in New Jersey and am interested in in a small web site for now to sell some custom items that are “in season”. I already have a web site for my company but need a specific web site for select products I would like to offer online that are pre-screened I have a line of t-shirts and sweatshirts I would like to be able to post add thumbnails/photos and have users be able to order in a few color selections as well as sizes. I need the following attributes: 1. I must be able to add, edit and delete a. Items b. Thumbnail photos c. Sizes and colors 2. The items must be able to be purchased through shopping cart software. I already accept credit cards so we would jus integrate with my current merchant services. 3. I need to be able to process the credit cards online automatically. The site can be simple, I jonly have a few items, 10-12 I would like to post. Thank you, Adam