Yes, valued is a Scrabble word!

Adjective

1. (usually used in combination) having value of a specified kind

2. Held in great esteem for admirable qualities especially of an intrinsic nature

Verb

1. Fix or determine the value of; assign a value to

2. Hold dear

3. Regard highly; think much of

4. Evaluate or estimate the nature, quality, ability, extent, or significance of

5. Estimate the value of