dirt cheap price; throwaway price
Refers to a price so low it is like throwing the item away. Often used in commercial contexts for clearance sales or extremely discounted goods.
This store is selling brand-name goods at dirt cheap prices to clear inventory.
捨て値でも買い手がつかない。
Even at a throwaway price, there are no buyers.
Compound of 捨て (throwing away) and 値 (price), literally 'throwaway price'.