The agreement concludes the terms of the sale and is the culmination of negotiations between the buyer and seller. In any case, you should make sure that you have a written agreement to make sure things go smoothly until the money and goods have been exchanged, and you and the other party will want to know what to do when it comes on the way to hiccups. This agreement can be used for a number of merchandise sales, from small purchases to large-scale contracts. In accordance with the Indian Sale of Goods Act 1930, section 4(3) deals with the contract of sale and the agreement of sale, specifying that the agreement of sale is also for sale. There is, however, a difference between these two concepts that we discussed above. .