I'm looking at your website and I'm trying to imagine what a "sales team" would do with it. Here's a good litmus test - seek out a sales professional in your area, pitch him or her on your idea of what you think a sales person would/could do, and get their feedback. You shouldn't have that much trouble finding someone - networking groups, friends, etc should be able to put you in front of a really good salesperson. I think you'll learn a lot by (a) having to come up with a pitch that is focused on selling the idea of bringing a sales person on board, and then (b) I think you'd learn a lot from the feedback the person gives you. It's a no-lose situation for you.
I would think that, because this will be a one-sided benefit (your team will benefit from this meeting but the sales person will not), you should keep it brief and buy them lunch/dinner/drinks. Asking someone to listen to and respond to a 30-minute pitch is a LOT, particularly if they are getting no direct benefit from it. Maybe keep it to 10 minutes with Q&A.
Things you'd want in the pitch:
* The idea
* What you've done so far
* Who is using it
* Why you need a sales team
* How the sales team changes things
* Commission plan
* How much of an opportunity there is for them (inc. any equity you are offering)
* 1yr, 2yr, and 5yr projections on both sales and the size of the sales team