I need  a Crawler which will visit say target.com, find all the products in
their catalog, note their UPC and price. Then go to Amazon, find the same
product and note its price.

At the end of the day I want a list of Target products with a comparison of
target.com prices and the corresponding Amazon prices.

Is HTTrack the software for this task. Will I have to do local processing to
get the required result.