Although most local Boards of REALTORS post actual Sold Prices, Texas does not require the Sold Price to be disclosed. Small country towns don't usually have enough recent transactions to give you easy comparables. If you aren't intimately familiar with the area, you really need a local REALTORÂ® to help you through all the hurdles and to tell you about local sales and values. See http://www.trulia.com/blog/ellen_doc_stephens_realtors/2010/03/why_do_i_need_a_buyer_s_agent
Properties larger than ten acres usually fall into the Farm and Ranch category, so be sure your agent is qualified in that arena. There are lots of questions like water rights, minerals, easements, flooding, wildlife and livestock exemptions, etc. that an experienced agent can help you to understand.
You can also hire an appraiser to evaluate a property before you buy it. Many appraisers will give you an informal appraisal without a big written report for less than the cost of a full appraisal.
Doc Stephens, REALTORÂ®