2 LEASED licenses that will be $170 total to keep once their time runs out.

You're just making it sound like you're trying to take advantage of someone who might be unaware of the stipulations that leased licenses have. Once YOUR original lease is over, they still have to pay regular price of $85.

I can see reason to test out the software; But most people that want to buy a license for vb pretty much already know why they want to buy it.. Not only that but they can get a free demo from VB: http://www.vbulletin.com/admindemo.php