I don't want to seem...Off or anything, but at $160 for the license, I kinda doubt anyones just gunna go "Oh yeah sure, here ya go." That'd be like me taking my entire collection of the Munchkin card games and just giving them away - I might do it if there was a gaming charity nearby, but otherwise theres not a lot of chance for it.
Add the $30 for updates after the first year and it's getting pricy.
Not saying it won't happen of course, but depending on what gets tied to that license you'll REALLY be in an uphill battle (if somehow a vB license is tied to the original credit card used to purchase it for instance, or to the paypal account used to purchase it, I can pretty much guarantee anyone aware of that wouldn't be transferring it to another user).