A phone call will answer all the questions or a quick visit is better, set an appt. 

And seller's Realtors had to really work hard to push their client's properties out there to the public and prospective buyers.Now, I find all they do is list your place on the MLS and sit back and wait for a call.

Everything from pay per click, to networking (I've found BNI groups to be a great resource), to cold calling.

As @Troy Gandee mentioned use the tax estimator on the County website or call the assessor.

.- What would you call a single unit of a duplex?

 WE  do both  give me a call and I can explain but depends on where the tax advantage is

How do I reach you for a call ? 

Very few providers are actually internally sourcing all of their national real estate data—there is lots of copying and stealing.

The internal parts are garbage.

Unless there is an emergency situation, take a lot of photos and call your insurance agent before doing any repairs.