Camera,
Involved in sales, well if you think about it, how many times have you laid a piece of paper in front of the prospect, read the information to them, and then they ask the question you just answeared.
Obviously you know that the best salesmen listen, think and then respond, on this forum it would be read, think and respond, even if it is the same tired old question.
The most successful salesmen realize that people buy the person before they buy the product. So they may be persistent, never annoying, they know when to leave.
Every salesman I ever knew who did not understand no was a failure.
People buy from people they like, people come and revisit this forum because they like who and what they find.