Gathering data from other sites... possible?
I'm building a html website in which users can search for certain products and be redirected to the website of the seller with the cheapest offer. There will be quite a lot of products listed on my site. Rather than manually keeping up with possible price changes, is it possible to design a script (for the lack of a better word) that crawls through desired products on the sellers' websites and automatically updates the price of the corresponding items on my site.
I'd like to add that my skillset is that of a beginner.
Thanks for taking the time to read my question.