a. 不受重视的, 无价的, 未经估价的

[ adj ]
having value that is not acknowledged
<adj.all>

Unvalued \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.