The idea of this project is to create a web page where the user enters the object you want to find, the number of results web pages you want to receive by email, and as the name of the web, these results indicate the web where is the cheapest product.
Other options are if you want the object sought is new or used and if the trade or website where you want to buy want to be regional or global.
Finally we find a field for the email so that the search results will be sent to that introduced address.
The basic idea of the algorithm is this.

The basic appearance of the html is this.

For this project I want to form a group without remuneration. Those who want to join the group write it in a comment.