I think your are posting in the wrong forum mate. There is other forums for selling sites and content on digitalpoint. Thought that I would just let your know.
I make my living online, I run content sites and some others... I quickly learned article submission no longer helps, don't get me wrong it used to. Article submission to 300 sites gets me backlinks that don't count and very little traffic under 100 uniques a week. Now submit the same article to ONE popular site and they accept it.....that's where the link counts and traffic rolls in. Also keep the UNIQUE content on your own site and you can get more traffic then a article submission would provide. I also run Constant-Content. CC gets 8,000 uniques a day and about 6,000 of those uniques are from the original content for sale not the free non-unique thousands of articles. The other 1800 is from direct requests and about 200 is from non unique content. My article site is not your typical article site we actually reject many free articles that people submit these days. We are a place that sells unique content, a writer market place where writers can sell unique articles. No sorting through bids, writing samples and resumes, instead you send out a request for content and the writers write the articles per your specifications. You set the subject, word count and the budget.
Article submissions may not be as good as they use to be, but I think it is still worth doing it as it doesn't take much time if you get a writter doing it for you and an automated submission service. As long as you can make your money back on what you pay per article, you should be alright, I guess. I may also take a look at your services as I have recently had a few authors from here right for me.