「You are cheap
A "cheap person" is usually a person who doesn't like to spend money, especially someone who doesn't spend money in situations when he can and should.
Oh, please, Dad, just this once don't be cheap.
They're always selling off stuff like that dirt cheap.
cheap and cheerful
There's a restaurant round the comer that serves cheap and cheerful food.
cheap and nasty
Her shoes looked cheap and nasty to me.
talk is cheap
Talk is cheap because supply exceeds demand.