Answer:
"You know a good deal when you see one" is one commonly used for marketing.
An example of a slogan which makes use of flattery is "Together we stand, Captain America is our banner, so stronger is our land"
This refers to the insincere praise which is given to a person usually for selfish reasons.
On the other hand, we know that slogans are used to push an idea which can be political or commercial and is usually memorable.
Read more about slogans here:
https://brainly.com/question/26553613