Except in case of perishable goods or when the seller reserves a right of re-sale, notice of re-sale to the buyer is necessary. It is necessary to give notice for the following reasons:
1. The buyer is given a reasonable opportunity to perform the contract, i.e., pay the price and take the delivery of the goods.
2. The interests of the buyer are properly safeguarded, i.e. he may see that the goods are re-sold at proper price.
If no notice of re-sale is given the seller cannot retain the surplus and cannot recover the deficit from the first buyer.