Yes, COLLECTORS is a Scrabble word!

Letter values in Scrabble US: C 3, O 1, L 1, L 1, E 1, C 3, T 1, O 1, R 1, S 1.

Is it a valid word?

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

a person who collects things
a person who is employed to collect payments (as for rent or taxes)
a crater that has collected cosmic material hitting the earth
the electrode in a transistor through which a primary flow of carriers leaves the region between the electrodes

Not playable in Scrabble US: AGGREGATOR.