The sale of something is the act of selling it, or the occasion on which it is sold.
They introduced stricter controls on the sale of weapons.
Our agency can help you with the sale of your house.
A sale is an event in which a shop sells things at a reduced price.
The shoe shop is having a sale.
I got this jacket for only £25 in the sale.
If something is for sale or up for sale, its owner is trying to sell it.
I asked whether the car was for sale.
Their house is up for sale.
A product that is on sale is available for people to buy.
There were no English newspapers on sale.
Their new album is now on sale.
In American English, if something is on sale, it is available at a reduced price.
On sale. Slacks marked down from $39.95 to $20.00.
I usually buy whichever brand of toothpaste is on sale.