Yes, VIBRAHARP is a Scrabble word!

Letter values in Scrabble US: V 4, I 1, B 3, R 1, A 1, H 4, A 1, R 1, P 3.

Is it a valid word?

VIBRAHARP is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a percussion instrument similar to a xylophone but having metal bars and rotating disks in the resonators that produce a vibrato sound