As a feeder shipper myself, most of the cost is in the dry ice and added weight on the package from that. We are also subject to higher handling costs from UPS, FedEx, etc because dry ice is classified as a hazmat material. The insulated shipping boxes also range from $6-$18, depending on the size, thickness, and volume that they are purchased in. In my experience, being based in NY, I won't ship ground to any states outside of my 2 day ground zone. I don't want to take the chance on transit delays. Many other companies have this same policy as well.