Havoc,
If the goal of your work is to get it sold, then your focus is on the wrong element. You should concentrate more on developing a strong Book Proposal, which is the primary sales tool to convince a prospective Agent, Editor, Publisher to seriusly consider your project.
A good Book Proposal will contain essential elements, one of which will be a sample of your writing. If the editor reading the proposal likes what they see, i.e. the proposal does its job, then they will want to see more. If you've never published a novel in the past, they may wish to see an entire manuscript to feel comfortable that you can indeed complete one, wether they read the entire thing or not before making a decision about doing business with you.
In your case, involving a series or trilogy or sequel, if this is how you've planned and organized telling the whole of the tale, that should be well-documented in your proposal.
If you'd like to know more about Book Proposals, I invite you to visit our website at
www.archebooks.com, and download an article in our Author's Corner entitled, "The Art of the Book Proposal." It's free, along with many other helpful writer resources.
Hope that helps,
Im realy getting close to completion now, so any help is wanted 
