on sale

Từ điển Oxford Advanced Learner 8th

on ˈsale idiom
1. available to be bought, especially in a shop/store
• Tickets are on sale from the booking office.
• The new model goes on sale next month.
2. (especially NAmE, SAfrE)being offered at a reduced price
•All video equipment is on sale today and tomorrow.
Main entry: ↑sale_idiom