I will write you a customized web scraper that takes any data you like, and stores it in an sqlite database. This usually only takes about a day to complete. I can store the data in other databases if you'd like, but does take more time. Just show me what information you'd like to process, and I can get it into a format you can use.
What the Seller needs to start the work
Access to the data, the data must be accessible relatively quickly.