UNVALUED
unappreciated, unsung, unvalued
(adjective) having value that is not acknowledged
Source: WordNet® 3.1
Etymology
Adjective
unvalued (comparative more unvalued, superlative most unvalued)
Not having been valued or appraised.
Not considered to be of worth; deemed valueless.
(obsolete) Having inestimable value; invaluable.
Source: Wiktionary
Un*val"ued, a.
1. Not valued; not appraised; hence, not considered; disregarded;
valueless; as, an unvalued estate. "Unvalued persons." Shak.
2. Having inestimable value; invaluable. [Obs.]
The golden apples of unvalued price. Spenser.
Source: Webster’s Unabridged Dictionary 1913 Edition