When I was boy (about 50 years ago) you got these things called stamps, see attached. If you wanted to send someone something, a letter or a parcel, you attached some of these (I think 4c covered a standard letter anywhere is SA, or at least your province). In the case of a parcel, you took it to the Post Office, they weighed it, then sold you the required number of stamps. That was it! The recipient got the letter delivered to their post box or in case of a parcel, a notification to collect it at the Post Office.
Now here's the kicker...the recipient paid nothing. Your stamp was the 'handling fee'. Fast forward to today and it looks like the postal service works on a 'reverse charges' system - the recipient is liable for all the costs. No wonder online traders offer free shipping - it really is free - for them!