What does it mean to buy back at a discount of $40

Buyback at 40 less than market price. Recycling at a discount is buying back at a lower price than the market price. A type of recycling. Refers to the separation of useful substances from waste through physical or mechanical processing into reused products. Discount, refers to the purchase and sale of goods at a number of percent of the original price of the price, such as by 90%, called 90% discount or nine buckle.