If the cannabis was not stored under proper conditions – then the product would degrade faster. In fact, if I was a dispensary owner – I’d sell my weed at full price for a year. If that particular strain still had some left over after a year – it would immediately have a 20% discount on it. When approaching the 18-month mark – sell it for 50% cheaper and by the 2-year marker – give it away for free as a promotional tool. After that it would virtually have no more retail value.