Yes, BASKETS is a Scrabble word!

Letter values in Scrabble US: B 3, A 1, S 1, K 5, E 1, T 1, S 1.

Is it a valid word?

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

a container that is usually woven and has handles
the quantity contained in a basket
horizontal circular metal hoop supporting a net through which players try to throw the basketball
a score in basketball made by throwing the ball through the hoop

Also: basketball hoop, field goal.