Each county/municipality has their own taxes - and most are computerized in their tax estimates and actual taxes reporting. As Anna suggested, GFE is great to see what closing costs are involved in the process of buying - I'd get three from different companies - to see who is more competative.
To find out more - I agree - ask your realtor on the specific property.
You can also check out Zillow.com valuations (often wrong, but they do give you some idea about the local values trends).
Also, you may want to ask your agent about other costs involved in your purchase (like inspection, home and flood insurance).
Hope this helps,
CDPE - Certified Distressed Property Expert
Beachfront Realty, Inc.