As an immerge from South Africa, she's going to either have to pay stupid door-to-door courier prices, or have it hand delivered through someone either going to, or returning the country.
If this sale does happen, for the buyer and seller's safety, this is a country where the national postal system is "ooh, what's in that box/letter/parcel?" ... there are local DHL branches, but there is also PostNet - who are really solid.
Just thought I'd add that in