invaluable Synonyms

priceless of immeasurable worth worthy worthwhile vital valued valuable useful unvalued unreasonable unpriced treasured serviceable semiprecious high-priced all important of immeasurable value of incalculable value of incalculable worth worth a king's ransom unreplaceable uneconomical unaffordable superexpensive overpriced of value irreplaceable pricey of the essence rich rare extravagant expensive exorbitant essential dear crucial critical costly collectible cherished beneficial advantageous heirloom helpful high profitable prized premium precious