Opening a statement with the words, “I’m not sure if it’s for you,” causes the listener’s subconscious brain to hear, “There’s no pressure here.” By suggesting that they may not be interested, you naturally increase their intrigue. (Location 147)
One of two things happens: your listener leans in and asks for more information because they are personally interested, or, in the very, very worst-case scenario, they say they will give it some thought. (Location 165)