Competitive systems on C2 can be placed in various categories⦅Red = Junk, Yellow = Caution (These are account killers that look attractive at first, as many systems have a negative net return after costs are factored in) Green= These are systems where the hypothetical historical data shows that costs are a small factor and profits are likely.
http://www.youtube.com/watch?v=uOjYt0LtUQI This is a link to a video that shows how find good systems.