Negotiate based on Total Cost of Ownership (TCO) rather than just the unit price. Discuss Volume-Based Pricing Tiers, as 500W motors often see significant price drops at quantities of 100+ units. Request a Spare Parts Kit (e.g., replacement carbon brushes for brushed motors or hall sensors for BLDC motors) to be included in the initial bulk order. Furthermore, clarify the Warranty Terms, specifically who covers the return shipping costs for defective units, as international freight can be expensive.