If you are going into a sales call that you might sense hesitation or its a "cold call", may I suggest, "The BS Card Sales Close":
Start by saying:
Before I begin I know there is some trepidation with truth and some members of my industry so I would like to start with a gesture.
This is my BS card. I use it when a salesperson is pulling my leg or I feel something is not right. I am giving this to you. Feel free to slap it down if something is a miss.
(Do your presentation)
Did you like having the BS card at stand by?
(Yes or nod)
Well since I did not see it stop us. I am going to write up the order and I will tell you what, keep the card for the next salesman you see. 😉
PS... give the BS card to a spouse or trusted friend while you practice your presentation and let them call BS as you smooth out and practice your delivery. Let me know how it worked for you.