The document discusses 9 cases related to contract law principles of offer and acceptance:
1) Heathcote Ball v Barry established that the highest bid at an auction without reserve creates a binding contract.
2) Thornton v Shoe Lane Parking determined that terms posted after payment at a parking machine were not incorporated into the contract.
3) Entorres v Miles Far East ruled that acceptance of an offer is effective when received, not when sent.
4) Three additional cases addressed issues like battle of forms negotiations, option agreements, and certainty of terms.
5) Carlill v Carbolic Smoke Ball Company established that advertisements can form binding unilateral contracts when conditions are met.
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