“No, my best price is $200!”
when to say it: The price of the item you’re selling is $179.99. The customer looks at you slyly and asks you, “Is that your best price?” You answer, with a laugh, “No, my best price is $200!” It’s a nice, light way of defusing negotiations, establishing the value of your product and telling the customer you won’t go lower.
Source: PETS+