CONTRACTS – GENERAL CONTRACTUAL PRINCIPLES – DISCHARGE, BREACH AND DEFENCES TO ACTION FOR BREACH – CONDITIONS – GENERAL MATTERS – where the plaintiff alleges that the defendants, in breach of two agreements entered into between the parties (the ESA and the New Agreement), failed to pay the plaintiff $810,460.49 for provision of services under those agreements – whether the defendants are indebted to the plaintiff for that amountCONTRACTS – GENERAL CONTRACTUAL PRINCIPLES – FORMATION OF CONTRACTUAL RELATIONS – MATTERS NOT GIVING RISE TO BINDING CONTRACT – VAGUENESS AND UNCERTAINTY – UNCERTAIN PROMISES – where the defendants allege that the terms of the ESA did not define with precision the ‘services’ the plaintiff was required to perform to the extent that the ESA is too uncertain to be enforceable – where the defendants further allege that the terms relating to the remuneration of the plaintiff under the ESA are uncertain to the extent that the ESA is too uncertain to be enforceable – where payments were made to the plaintiff by the defendants pursuant to the ESA on a regular basis – where the defendants do not seek to recover those amounts – whether the ESA is void for uncertaintyCONTRACTS – GENERAL CONTRACTUAL PRINCIPLES – FORMATION OF CONTRACTUAL RELATIONS – CONTRACTS IMPLIED FROM CONDUCT OF PARTIES – where the plaintiff alleges that the ESA ended by mutual agreement and the parties entered into another agreement (New Agreement) on similar terms – where the plaintiff continued to perform services for the defendants – where the defendants submit that there was no New Agreement but rather that the plaintiff was engaged on a “temporary basis” following the expiry of the ESA – whether the parties entered into the New Agreement – whether the terms of the New Agreement are certain so as to be enforceableESTOPPEL – ESTOPPEL BY CONDUCT – PROMISSORY ESTOPPEL – PARTICULAR CASES – where the defendants allege that they were induced into entering into the ESA with the plaintiff on the basis of the plaintiff’s misrepresentations – where the defendants submit that the plaintiff should be estopped from enforcing the ESA on that basis – whether the plaintiff made the representations alleged by the defendants – whether the defendants relied upon those representations to their detrimentESTOPPEL – ESTOPPEL BY CONDUCT – ACT, OMISSION OR ASSUMPTION – REPRESENTATION GENERALLY – NATURE OF REPRESENTATION – where the defendants allege that the plaintiff made representations as to his ability to sell the defendants’ property “within 3 to 6 months” – where the defendants allege that the plaintiff made representations that, if he were engaged, the defendants’ businesses could only “move forward” – whether such representations were made – whether such representations were misleading or deceptive so as to give rise to a promissory estoppelESTOPPEL – ESTOPPEL BY CONDUCT – ACT, OMISSION OR ASSUMPTION – REPRESENTATION GENERALLY – ACQUIESCENCE, ENCOURAGEMENT OR SILENCE – where the defendants allege that the plaintiff had an obligation to inform them of his prior unsuccessful business dealings – where the defendants allege that the plaintiff’s failure to do so was a representation by silence that was relied on by the defendants when entering into the ESA with the plaintiff – whether the plaintiff’s silence constitutes a representation – whether such representations were misleading or deceptive so as to give rise to a promissory estoppelESTOPPEL – ESTOPPEL BY CONDUCT – CAUSATION – RELIANCE – where the defendants allege that, in reliance on the plaintiff’s misrepresentations, they entered into the ESA – whether, if the alleged misrepresentations were made, the defendants relied on them – whether the defendants have shown detriment by relying on the alleged misrepresentationsTRADE AND COMMERCE – COMPETITION, FAIR TRADING AND CONSUMER PROTECTION LEGISLATION – CONSUMER PROTECTION – MISLEADING OR DECEPTIVE CONDUCT OR FALSE REPRESENTATIONS – MISLEADING OR DECEPTIVE CONDUCT GENERALLY – MISLEADING OR DECEPTIVE: WHAT CONSTITUTES – where the defendants alleged that the plaintiff made three misleading or deceptive representations that induced them to enter into agreements with the plaintiff – whether the representations were made – whether the plaintiff engaged in conduct that was misleading or deceptiveTRADE AND COMMERCE – COMPETITION, FAIR TRADING AND CONSUMER PROTECTION LEGISLATION – ENFORCEMENT AND REMEDIES – ACTION FOR DAMAGES – LIMITATION PERIOD – WHEN CAUSE OF ACTION ACCRUES – where the plaintiff alleges that, even if the defendants make out a misleading or deceptive conduct claim, the limitation period prevents them from pursuing that cause of action – whether the cause of action accrues at the formation of the agreement or at a later timeTRADE AND COMMERCE – COMPETITION, FAIR TRADING AND CONSUMER PROTECTION LEGISLATION – ENFORCEMENT AND REMEDIES – ACTION FOR DAMAGES – ASSESSMENT OR AVAILABILITY OF DAMAGES – GENERALLY – where the defendants claim relief under s 237 and 243(c) of the Australian Consumer Law (ACL) or s 36(3) ACL, together with s 237 and 243(c) ACL – where the defendants do not seek to recover any amount against the plaintiff – where the defendants seek to apply the relief sought in the manner of a “shield” by seeking to offset any amount claimed by the plaintiff – whether the defendants are entitled to relief