I think all he would have to do is wrap some cardboard around the base portion (to prevent the wheels from rolling in their cargo bay of the bus), and affix a TAG to the jack with the SHIP TO: and SHIP FROM: information... and I beleive Greyhound would take it.. or at least they used to take stuff like that..
PS. Greyhound does not require that items be totally boxed as most shippers do..
Yes, I think you could ship it just like Gary says. Look at what UPS
says about irregular shaped items. Note that they will ship tires --as is-- as long as you get the label well attached. Think I'd insure it....