The search engines do not always have the most recent copy of a page on their index. However, that page may have been changed, perhaps extensively, by its webmaster after that indexing was done, on maybe July 1, 1998. But that change may not be indexed yet because the engine would revisit that page maybe 2 months later. So if you take its statistics and use them, your pages will rank poorly. What you should do always is look a little closer at the information you get from your search results.
Many engines provide extra information about each page on their results list such as file size.
Look at the reported file size on the search result, then go on to the actual page and see whether the file size is just about the same. On Internet Explorer, you do so by right-clicking on the page and choosing the Properties menu item from the popup menu. Another way of finding out is seeing whether there are any differences in the title and description of the page on the search engine results and on the actual page itself. Most engines use the page title as the title of the search listing, and the meta description or first few words on a page as the description on the results. You might find, for example, that the title on the search result reads 'Super Real Estate Page' and on the actual page it reads 'A Big Super Real Estate Page', meaning that the page currently available is a modified version of the one that was originally indexed at by the search engine.