Many folks buy because of a "fear of loss". Can you market your product as a "one-of-a-kind" for a "limited time only?" Show them what they stand to gain as well as what they will lose if they don't order now. One auto salesperson we know always shows the purchaser a model that is a "second choice" in case the "preferred model" gets sold before the customer makes a decision. This can really speed up the sales process.