If they say, "Not interested"
[If they are NOT interested, you have said too much. They are trying to form an opinion of what you are trying to show them.]

But say any of the lines below to get them to "look":
1. If  I  didn’t  know  what  I  know  now,  I  wouldn’t  be  interested  either.

2. If you had something that was really really good, would you call me? Well  that’s  why  I’m  calling  you.

3.  Are  you  saying  that  you’re  not  interested? Or Are you saying that you are interested  but  you’re  afraid  or  scared?

4. That's cool, it's probably NOT for you, but I'm going to show you anyway because I need some practice.[smile]