I want to buy an aged domain that will expire in one week, it's has exactly the same keyword(.com) i am targeting. 0 PR, Age: 3 Years, 26 Backlinks and 1900 Indexed pages on google that had a good content related to the niche. So is it good a thing to have those indexed page or no ? will they add power to my future website ? Thanks.
those indexed pages would gone with next crawl. i dont think you would enjoy any benefit from those indexed pages for long.