PayPal uses the services of two big courier companies in the US–USPS and UPS: > USPS Shipping is available for domestic and international shipping of flat rate boxes, priority mail, first-class mail, priority mail express, and USPS Commercial Base pricing. > UPS Shipping gives special eCommerce discounts on domestic and international shipping up to 45% off on ground shipments and up to 55% off on 2nd-day air shipment.