F.P.A.N.O.
Fixed Price and No Offers means you're not gonna let someone talk you out of your deal. You're paying what you said you'd pay. No offers. No deals.
"I'm not even gonna listen to your offers. I'm taking it at 1500."
"No offers. Just pay the price and be done with it."
"You think you can get me to lower it? Nope. I'm paying 2500, and that's final."