Pricing a home is an art not a science. I can honestly tell you that anyone who tries to price a residential property, without even looking at it, is doing you a massive disservice. How can someone give you an honest assessment without first seeing what you have done to the place. You might be able to get a general idea of prices through sources such as Trulia, however, the interior of a property does matter. Otherwise, there wouldn't be tradesmen dedicated to buying, fixing and reselling. That is why it's best to contact a professional to get their opinion on the current value and/or ways to improve that value; if the case may be.
Also, It is not always necessary to interview a bunch of agents to pick one. This can be time consuming and at the end you may not like what he/she has done to market your property anyway. First, consider the company your Realtor is associated with to as it says a lot about the individual. Second, experience and a solid marketing plan are essential. Finally, find someone you feel comfortable with. It is very important that you do not feel intimidated, for instance, when requesting an open house or that your home not be shown at certain hours when your kids are asleep.
Remember you are going to be working with this individual for months not days or weeks. Though every situation is different, sometimes you need to have control over what is happening and you'll be needing a team player with coaching capabilities who can adopt. Not necessarily someone who can outmaneuver you. A good Realtor will not only have the skills to do it all, but will clearly know when to pass, play or coach.