Yes, BENJAMIN is a Scrabble word!

Letter values in Scrabble US: B 3, E 1, N 1, J 8, A 1, M 3, I 1, N 1.

Is it a valid word?

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

gum resin used especially in treating skin irritation
(Old Testament) the youngest and best-loved son of Jacob and Rachel and one of the twelve forebears of the tribes of Israel

Also: gum benzoin, gum benjamin, asa dulcis.