The 1st is to create me cURL dos command line that login to the website and keep the session and then use another cURL dos command to access the page that I want and then save it to a file, I will input the web page myself. (you will need to create it for 4 websites one of them is www.ebay.com)
The 2nd is to create a program to auto download the product in this website (this company has 4 websites, they looks the same, i will need your program works with 4 of them)