Calculate the Total Cost of Ownership (TCO), which includes the unit price, landed cost (freight + duties), and maintenance. While traders may offer lower upfront prices, verify if they include the standard Hayward warranty or if they provide their own service guarantee. For bulk orders, aim for a volume discount of 10-20% when ordering more than 50 units. It is often more economically feasible to source Variable Speed Pumps despite the higher initial cost, as their ROI is typically achieved within 12-24 months through energy savings, making them easier to resell to end-users.