have you heard of this make of aerator?

hello , I was wondering if any of you have heard of a Ferguson lawn aerator? dont have a web site for youjust an e-mail address. I saw one tonight while my family and I was out eating dinner. I talked to the guy about it and looked pretty heavy duty I dont do this type of service but am starting to get a lot of request on this type of service.What is a good rule of thumb for charging for this type of service? Any help would be great. thank you