During the presentation demonstrate about the ROI (Return On Investment) and the ROI time period. Also ask quality questions to fully determine their situation and buying needs. Try to find out when they are planning to buy because some people show interest just to know the pricing. Customer testimonials can be used to support the price objection. Send the proposal to only well qualified prospects where there is high chance of closing the deal.
To initiate further discussion tell the prospect about the action plan or ask the prospect how would they like to take the discussion forward.