My dad drives a truck (owner operator), and gets all kinds of telemarketing calls because of it - factoring, tools, that kind of stuff. This one guy kept calling, and finally, the guy called when he was just driving down the road and had time to kill. So he acted all interested and kept asking about different options, etc, payment plans, just kept dragging it out, until after about 45 minutes he just said "Nope, I don't think I need that after all", and hung up. And the guy didn't call back.