Rent prices for college students

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I am currently looking at investment properties in Buffalo New York. The areas I am looking are around UB south and Canisius college. I am trying to get an accurate idea of what I can expect from rent and have been looking on craigslist and other websites at the available units for rent. The problem I am running into is there currently there are not a lot of available units to compare prices. 

I was hoping individuals on here could help shed some light and give me a range of what to expect in both the areas. Currently my estimates are 800 for a 3 bedroom by UB south and 900 for a 3 bedroom in Hamlin Park. Are my numbers accurate.