UNVALUABLE (_comparative_ MORE UNVALUABLE, _superlative_ MOST UNVALUABLE)
* (obsolete) Invaluable; beyond price. [16th-18th c.]
* 1603, John Florio, translating Michel de Montaigne, _Essays_, II.4:
I kon him thanks that he hath had the hap to chuse, and knowledge to cull-out so worthy a worke, and a booke so fit to the purpose, therewith to make so UNVALUABLE a present unto his Countrie.
* (rare) Not valuable; having little value. [from 17th c.]