The answer largely depends on your purpose for wanting to obtain the likely value of your property... Generally, you have two good options...
One is to hire an appraiser. If you find a good, well qualified valuation expert, they will be able to give you a reasonably good idea of the value of your home.
Your second option is to have a Realtor do a "CMA" or Competitive Market Analysis. While any Realtor can provide you with this report, the better the agent, the better the quality of the content. Frequently the same condo can be valued at several different price points based on recent listings or sales.
My recommendation, if you are considering selling your home, is to find a Realtor with a lot of success and put your faith in them. If you are considering selling the property yourself or are re-financing your condo, then you are better off spending the money to hire an appraiser.
Feel free to contact me if you are interested in obtaining the names of several appraisers in the Ankeny area.
All the best!