There should be plenty of Burgmansia growers on this site and if they use the priority boxes from the post office it should run about $5.60 to $12.35 depending on the amount shipped in those free priority boxes, minus shipping. I make the mistake of sending some roots using a box I had from home and it cost double using my own box to ship. This is the first year for me so I do not have anything to provide. I have received 5 cuttings and expect to have to find locations for all of them as they do get large.
Happy gardening.