Yes, TOASTERS is a Scrabble word!

Letter values in Scrabble US: T 1, O 1, A 1, S 1, T 1, E 1, R 1, S 1.

Is it a valid word?

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

someone who proposes a toast; someone who drinks to the health of success of someone or some venture
a kitchen appliance (usually electric) for toasting bread