One powerful example of this is Bryan Kumar's Money and Power interview of Allen Says, owner of the Warrior Forum. Even though Bryan could have written his own E-Book about the same subject, he secured an interview with a name that immediately commands an audience.
People were so desperate to get their hands on those interviews that he was able to sell resale rights for hundreds of dollars and regular copies for $100 each. All of this was because he simply leveraged Allen Says fame through an interview – and this gave him an instant market for his product.
You can do this, too: you can gain leverage on experts through Interviews. You just have to determine who the experts are in your field – and which might reasonably be approachable. Additionally, you will want to come up with an extremely compelling reason for them to pay attention (i.e. Not only will this give you exposure, but I will pay you $100 simply for allowing me to interview you for 30 minutes).
There is one important thing to keep in mind when gaining leverage on experts through interviews – and that is to always clearly explain what you plan to do with the content and exactly how much they will be compensated for it. If they're only getting $100, don't make it confusing – let them know that is it. If they wont do it for $100, you might want to attempt to work some type of profit-sharing agreement, which may be a good idea, anyway, as it will give them some incentive to promote the product themselves.