Your best bet is working with a Naples Realtor such as myself. We have access to sales history based on geographic area, community, type of home, size of home, price range, time period, etc. Let me know exactly what you're looking for, and I can personalize a report that will give you the precise information you're looking for.
If you only get your information from sites like Trulia (a great site, by the way), you are not guaranteed to see the complete picture. Plus it's difficult honing in on your exact specifications.
Ted Epstein, Realtor, e-PRO
Prudential Florida Realty