Bulk promotional buy: 15,000 hardshell suitcases for a back-to-school luggage event

We run a regional chain of general merchandise and variety stores and are planning a promotional luggage event built around back-to-school travel and dorm moves. Looking for a bulk, price-driven lot rather than a custom programme. Product: polycarbonate hardshell, mixed 20 and 24 inch (roughly half and half), any of your standard colors, no custom branding needed — a plain retail box is fine. Quantity: 15,000 pieces total, single shipment, DDP to our Columbus distribution center. This is a price and availability driven buy: please quote your best unit price at this volume, confirm what you can produce and ship without a long lead time, and note whether smaller top-up orders would be possible if the promotion sells through faster than planned.