Immediate idea is that scraping current complete product listing from amazon, ebay, alibaba and saving into database for public use. I am not sure one month is

Immediate idea is that scraping current complete product listing from amazon, ebay, alibaba and saving into database for public use. I am not sure one month is enough or those sites have anti-robots policy. Another is crawling and indexing the internet to make another privacy-respected or specialized search engine(how to continue the effect one month later is an issue).