OP-If you are doing an appraisal near UW-Madison, I'd certainly focus on that area and have a hard time believing that there aren't sales out there for that market. If you are doing student apartments in another town, maybe try to identify other comparably-sized universities, but it is also important to identify enrollment trends in those universities. For example, I just completed a couple appraisals of student apartments near a state university where enrollment is 60% of what it was ten years ago. Yet there are a couple of universities in IL where enrollment is increasing, and as you might expect, there is a significant difference in rents, cap rates, vacancy, etc. between the two locations. This could warrant quite large locational adjustments, or outright elimination of consideration of some locations as comparison to your property. Some of the most notable supply and demand experiences that I've dealt with involves student housing.