This document summarizes key concepts from the Sale of Goods Act relating to contracts for the sale of movable goods in India. It defines a sale as a contract where ownership transfers from seller to buyer, while an agreement to sell involves future or conditional transfer of ownership. It outlines essential elements of a sale contract, implied conditions and warranties, and consequences of breaching conditions or warranties. Exceptions to the caveat emptor doctrine are noted. Hire-purchase agreements and their differences from installment sales are also summarized.