I have experience with LTL (less than truckload) freight carriers. It's not pretty! I would suggest if shipping via this system that you use a very reputable carrier and indicate that the pallet cannot be stacked. They typically install a cone on the top of shipments of this type. If the cone is crushed then you know something was stacked on it. I would also use a carrier like FEDEX Freight or other reputable carrier that will insure the shipment.
One thing to keep in mind, it is absolutely essential for the receiving party to inspect the load for damage PRIOR to signing for the shipment. Drivers are notorious for getting people to sign right away. Why? Because the signature transfers ownership. Once you sign it's yours and now your problem. Never sign a bill of lading until you are completely satisfied that the shipment arrived in good condition. If there is any damage to the packaging, photograph it and indicate it on the bill of lading. You also have the right to refuse the shipment. If you refuse it, the responsibility is transferred back to the shipper and the carrier. You have no responsibility whatsoever. Understand this process and you can't get burned if you are the buyer.
One thing to keep in mind, it is absolutely essential for the receiving party to inspect the load for damage PRIOR to signing for the shipment. Drivers are notorious for getting people to sign right away. Why? Because the signature transfers ownership. Once you sign it's yours and now your problem. Never sign a bill of lading until you are completely satisfied that the shipment arrived in good condition. If there is any damage to the packaging, photograph it and indicate it on the bill of lading. You also have the right to refuse the shipment. If you refuse it, the responsibility is transferred back to the shipper and the carrier. You have no responsibility whatsoever. Understand this process and you can't get burned if you are the buyer.