Eileen, Trulia includes recent sales of some homes in your area within the home search. Simply select sold instead of for sale or foreclosures. I do have access to all transactions through the Multiple Listing Service and Wayne County Public Records if you would like information about all homes sold during the past few months.
As to your question, Looking for the company that sold the most homes is one way to look, but what if they sold the homes for 60 percent of their actual value. Would you still want that company to sell your home?
I suggest looking for a local company and interviewing several agents. Here are some websites that may help.
On Trulia, select Member Search and enter either Grosse Ile or your zip code to find members that have answered questions for your area. Their actual city will appear on the right hand column.
http://mirealtors.com/consumers.html State of Michigan Association of Realtors(R) website. Select Find a Realtor from the top menu. This would be the most complete list.
http://activerain.com/states/MI/counties/Wayne+County and select cities around you
Alternately, I can send you a list of several agents that may meet your needs. When interviewing agents, you should focus on their marketing and not the price range for your home. I do suggest interviewing at least 3 agents and choosing the person that best fits your needs.