The biggest reason prospective buyers aren't buying right now is because they aren't educated about how amazing the opportunity is right now. Between the record-low interest rates (yes, they dropped in response to the Fed rate cut, to around 5.25% for a 30-year conventional loan) and the low prices available in most markets, buyers would be crazy not to buy.
But if you don't tell them, how will they know? Sam Miller out of Mt. Vernon, Ohio, regularly posts valuable information through video stream on YouTube and his own Web site. Go listen to his broadcast and create your own, or if you don't have the time and resources to do that, send his link out to your prospective buyers. Third-party experts carry credibility!