Comparison Shopping Crawler

We want to build a service like [login to view URL] or [login to view URL] So, we want to continuously crawl about 100 shopping sites and get product information, price, category etc. We need a back-end crawler which -Crawl about 100 sites automatically -Merge information for same products. -Categorize them -It needs to be flexible and easily modifiable against site design changes, or new sites to crawl. -And we need a front-end That will enable users to search and compare this prices, with keyword and category filters. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Ms SQL ASP IIS 5.0 or any other platform which runs under windows server