@Mainebot I'm currently out of work too (though I should have a contract coming in any day now), so I can't offer you anything. But maybe you can advise me a little.
I've got an app on the elementary AppCenter and so far I've been selling it on it's feature list. But as the app nears to be fully featured I think it'll be more helpful for prospective users to describe my design vision (as the feature list is already long for a bare bones app).
@alcinnz don't sell features, sell benefits. Features are meaningless without the context by which they improve the life or experience of the potential user. Have the features listed, but focus on what those features mean :)