Bad merchandise is never cheap.
More French Proverbs:
Not every one that dances is glad.French
Nothing is more contagious than a bad example.
French
What is learned in the cradle is carried to the grave.
French
A good example is the best sermon.
French
Courtesy that is all on one side cannot last long.
French
Who serves the mass is thanked by none, but cursed if aught left undone.
French