Scraping datas

I want some datas from a website which is not visible. There is a site at which a listing of thousands of datas. The site is not showing all datas to visitors. They are showing only 10 pages having 50 datas on each page only. Thus website show only 500 datas to visitors. They are changing the datas after some time interval so that any time only max 500 datas shown to public. However they are showing/telling that they have such much datas in thousands. I want total approx 35,000 datas under approx 5 categories. THINK SOME DIFFERENT, UNIQUE - OUT OF BOX. USE YOUR SKILL/EXPERIENCE. Details in zip. Bid only if you are confident.