It's actually worse than that....there have been lawsuits about sf so most listings do not use them. SF is relevant in a commercial investment, but it's usually not a deciding factor in residential investment. I'm not certain why you are looking for a sf analysis, but as Pat mentioned, it is very possible to obtain pricing statistics. I prefer median to eliminate the outliers. I personally own property in Rockaway and am very familiar with housing there and the market. Please let me know if I can help you find the what you are looking for or point you to the best source of information.