Webpage Scanner and Stock Manager (C#)

A program written in C# (Visual Studio 2008 if possible), to screen scrape the contents of an online warehousing company website and extract out data to be used for my eBay business. My eBay shop stocks these items and its important for me to know when my online warehouse delists stock (or runs out of stock) so that I can also remove the stock from my eBay shop before a customer buys a product which I cannot stock. Below is how I think the code should be written, but I am open to suggestions for improvement to the winning bid. 1. Stock Management a. A file named “[login to view URL]” will contain the products which my the online eBay shop currently stocks b. A file named “[login to view URL]” will contain the products which my the online eBay does not want to stock c. A file named “[login to view URL]” will contain the categories that I want this program to search for. GUI interface to add or subtract categories from the file. 2. Stock Checking a. The files “[login to view URL]” and “[login to view URL]” will be used to compare the URL screen scraping of the warehousing website i. New products which have been listed will be displayed in the GUI with the option to: - Add new products to either “[login to view URL]” or “[login to view URL]” using GUI. - New product summary alerts sent via email. - New product details (Title, description, price, photo etc) to be inserted into a html eBay advertisement template ready for eBay posting - GUI option to list this new product in my eBay shop (not sure if this can be done easily, ADDED OPTION QUOTE SEPERATELY) ii. Removed products (and out of stock products) will be displayed in the GUI with the option to: - Removal product alerts sent via email. - Remove the products from either “[login to view URL]” using GUI. - Automatically remove the removed products “[login to view URL]” or “[login to view URL]”. - GUI option to automatically delete the removed product from my eBay shop (not sure if this can be done easily, ADDED OPTION QUOTE SEPERATELY) 3. Stock Postage a. When creating the listing, using the template, a postage calculator to be created to automatically calculate postage costs for Australia and International postage for the listing only, not for the customers to use. This will be a simply calculator. 4. Code Maintenance: Please quote on an option for code maintenance/improvements separately. I am an Engineer and can code in Visual C#, therefore I expect the code to be well commented so that I can modify it in the future. Currently I am working on a different coding project, thus have no time to write this project described above. QUOTE RATES SEPERATELY