I am working on analytics side project and I need data-set (current + historic data). There is no open (public and free) available data-set for required data.<p>I am wondering:<p>1. What are you experience? Is it possible within reasonable time and effort create own data-set from data published on internet. Data is mainly published over JavaScript. It's not raw data, but enough for my use case.<p>2. Have you favorite source of data sets with raw data? Domain doesn't matter (asking just for future cases)