worth a king ransom (adjective) precious: expensive; rare
Sinonime: choice,
costly,
dear,
exquisite,
fine, high-priced, inestimable,
invaluable,
priceless, prizable, prized, recherché,
rich, treasurable,
valuable, worth a king's ransom, worth eyeteeth, worth one's weight in gold
Antonime: cheap,
common,
inexpensive