I love it when I'm selling something for say in round figures, $100.
So they then ask "give me a better price". I ALWAYS INCREASE the price to say $120. You get a stunned look and they then say "You told me $100"
I reply yes, but you asked for a better price. $120 is better for ME. And depending on how they react, I often add that if you are unhappy with $120, we go UP. I tell them I gave you a price for what I want. I'm not here to play games, either pay the $100 or I know you are not interested. Move on.
And it works every time... They pay the $100.
Ian