How to persuade, motivate or reassure

Now, you are a salesman.....
Don't you agree the price is right?

Don't forget we are cheaper than our competitors.

You must admit it's a beautiful design.

There is no cause for concern.

Let me assure you that this is the best product on the market.
Let me assure you, it's a great value, and you don't need to buy a XXX or XXX.

As for future service, there is no cause for concern.
We guarantee it.

You don't have to worry about competition when you use this product.