Unfortunately one cannot set a range for how much rent they are willing to pay. Ads contain a significant amount of information about the apartment, but usually not the apartment size. Listings are updated twice weekly. When you first get to this page, just hit search immediately. You will then be greeted with a much better search form to allow you to find exactly the apartments you are looking for.
Ads contain a wealth of information.
Listings are updated once every two weeks. The Badger Herald list its classified ads on-line. Although there is no search mechanism available, the ads listed here are of prime interest to students. As with the Herald, The Isthmus also lists its classifieds on-line. Although there is a search field available, it is next to useless.