If the model is something that can be given away, take a look at
Dream Pod 9's Tribe 8 demo-game . No character generation, but a concise outline of the game mechanics, the game setting, a set of pre generated characters and a solid scenario for them to play through. All in what amounts to four sides of A4.
Something like that (a set of pre-generated characters in a specific setting, with a concise explanation of the core rules and a solid scenario) is what would be best - but, given that BRP is not tied to a specific setting, what might be best is a set of these: fantasy, SF, superhero, perhaps western, espionage and post-apocalypse as well?
Cheers,
Nick Middleton