You've received some very good answers. I would add one thing which is perhaps the most important: How it appears on the internet!
About 80% of today's home buyers start their search on the internet.
Questions to ask when interviewing agents:
1) Will you use a professional real estate photographer and include a virtual tour?
2) Where will the listing be featured? Will the agent invest in a special Agent Showcase on Realtor.com and Homes.com? (My company 's RE/MAX .com site is second only to Realtor.com in Google searches because of its instant name recogntion around the world) Will it be appear on Trulia, Yahoo and Craig's List?
3) Are these services included in the commission or extra expenses?
We are already showing increased interest in home buying as a result of the lower interest rates.
I hope this is helpful if you decide to sell your home,