Basic e-commerce site for electronic circuit boards

My problem: I currently sell coffee roasting electronics on ebay and I have many other products that I would eventually like to sell. Ebay charges a lot to sell and I’d like to cut them out and eventually improve profits. My longterm vision is to have a site that features multiple "areas" of products (each separated by domain). Most of these gadgets just make a person's hobby easier or more enjoyable. Some of the products I sell are related to "Coffee Roasting", Cigars, Bluetooth Sensors, etc. Each domain should point to the area and the area's should not be linked together. For this project, only one product area ([login to view URL]) needs to be supported. I'd like a nice landing pad (index page) that has a coffee roasting theme. The site should be commerce based and may use something simple like Paypal or a very simple cart system. I'd like an "About us", Contact Us, and FAQs page. I would like some thought put into making sure I can add-on additional product areas in the future. Ideally, I would like this done using Visual Studio ASP.NET. I am technical and would need to be able to maintain the site by adding products, changing descriptions, and prices. I believe ASP.NET would provide a lot of dynamic flexibility in the future and I'm familiar with it which would make it easier for me to maintain. My expectation is that this project will grow in time. So establishing a good working relationship with someone who can implement projects beyond this phase would be ideal. I'm looking for high quality work with some forethought into the longer term vision.