Often used to describe something of great value.
La belleza de esa obra de arte es impagable, ya que evoca emociones profundas en quienes la contemplan.
The beauty of that artwork is priceless, as it evokes deep emotions in those who behold it.
Su generosidad era impagable, siempre dispuesto a ayudar a quienes más lo necesitaban.
His generosity was priceless, always willing to help those who needed it most.