Never listen to your customer. Just tell him/her what you’re going to tell him/her. Tell it to him/her. Then shut up and watch him/her squirm.
Don’t try to figure out what makes him/her think. Who cares. Just get the money.
Always cover every feature of your product and the associated benefits. He/she has to understand all the things they’re getting for the price.
If he/she doesn’t say anything you’re home free. They are just getting ready to sign the order.