Propetry Value

Check the local tax assessment value of your property with your county clerks office-this is a good starting point. Between that and the comparable- you should be able to come to a consensus.

You can always contact a local appraiser too and pay to have an actual valuation done that you should be able to use when and if you sell. Probably run you $200-$400 depending on your area. This bypasses getting tied up with a realtor.

As an FYI, Zillow in Texas is NOT at all accurate. Texas is a non disclosure state with regards to property sales prices, so the only data the site has to go on is from Tax records.

You need to evaluate your property from an investors perspective. What resources does it have to offer? How are the roads around it? What infrastructure is there or missing? Would it be developed for personal or commercial use. Using those, you can start to consider how much it should go for.

You've already received some excellent suggestions. With all of the aforementioned factors in mind, you can still ask a realtor to do a Comparative Market Analysis on your property without the obligation of listing. You would then have a very good idea what price you should list your property. Good luck!

Mineral rights? Water rights? Future windwill rights?
I know many people who would pay for land with these features. I would ask top dollar because you can always come down, but you can't raise the price.

Do you have improvements? Timber? Creek/flowing water source? Well/septic? Is there anything at all on the property that is considered an improvement or would pique additional interest aside from the land itself?

You can go on Zillow.com and see what they say. All you have to do is type in your address and it will pop up and let you know what they think it is worth. It's pretty accurate, at least where I live.