ranger: based on what cknight and CJ provided, in addition to my own experience with ground shipping, I would strongly recommend spending the extra $25 (at least with my ffl dealers) and have them ship the firearm to a ffl dealer of the purchaser's choice. Yes, it adds $25 or so at each end but the ffl dealer ships it under his ffl and it is covered by his insurance (at least with my ffl dealers) and whether it's UPS of FedEx, there aren't any problems.
To me, it's not just a matter of getting the firearm somewhere at the least cost, it's a matter of getting it there securely and legally and without having to deal with fools and idiots who don't know what rules are and want access to your or the purchaser's possessions.
Let's not forget, that most firearms that are lost, stolen or just disappeared become that way before they even leave the shipping warehouses. HTH. Mikey.