Yes, sale is a Scrabble word!

Noun

1. A particular instance of selling

2. The general activity of selling

3. An occasion (usually brief) for buying at specially reduced prices

4. The state of being purchasable; offered or exhibited for selling

5. An agreement (or contract) in which property is transferred from the seller (vendor) to the buyer (vendee) for a fixed price in money (paid or agreed to be paid by the buyer)