Nice looking home. It sold in 2004 for $168,500. (not counting concessions from the Seller) As far as an appraisal for the home, you'll need to get an appraiser to come out. There is a fee. (around $400)
A realtor can do a CMA. That will let you know what the home will sell for. That is free. You may want to get more than one CMA. Sometimes Sellers have it in their mind what they want for the home. What the Realtor will do is look at the homes sold within the last 6 months. (around the same sq. footage, floor plan, etc...)
As a buyer, you don't want to pay more than what the home is worth. You also can get a realtor to help with a CMA. If you have a Buyer's agent, it's something the agent usually does. That way you don't pay more for the home than it's worth.
Hope this helps,