I've been using SEOClerks for about 1 year now and one thing I had in mind was for the services on the left margin, under the ratings, their could be a count "Total number of completed orders"" and that will display the total number of orders on that service because most people do not rate and complete the order, seller's usually have to wait 5 days for completetion and it does not show up on the service.
This count could also be on user's public profile. "Total number of completed order: #"
And also to take this another step SEOClerks should add "Total number of cancelled orders: #"
I think this is a good idea! Of course I would add this if I was a SEOClerks admin, Let me know if you like this idea!