These Buy with Prime Conditions of Use (this "Agreement") contain the terms and conditions that govern your access to and use of the Services (as defined below) Master Agreements (MA) are utilized when the County desires a list of pre-qualified vendors to perform various services, on an as-needed basis.Terms of sale or lease and availability are subject to change or withdrawal without notice. Buy with Prime can take the headache out of fulfillment. Our programs can benefit your business in more ways than one and offer vital resources for expanding your services throughout Los Angeles County. This article will delve into what BuySell Agreements are, how to determine when you need one, their benefits and potential drawbacks for small business owners. A prime vendor agreement is an agreement between a business and its suppliers that are considered essential for the company's operations.