"To agree a price" means to come to an understanding or reach a mutual decision on the amount of money that is acceptable or agreed upon for a product or service. Full definition
Otherwise, I was very happy with my experience and agreed price of my new car. (cars.com)
My team and I work with external vendors to agree pricing on hardware and software contracts, always looking to get the most cost - effective price where possible. (targetcareers.co.uk)
They can be charged on the basis of successfully accomplishing a task within previously agreed parameters for a previously agreed price (with both parameters and price established according to competitive market realities). (abacenterforinnovation.org)