Many of the rifles coming out of South Africa are mint or unused - I think they're simply unused rifles from reserve stocks. There seem to be two major types: Long Branch rifles in new condition, and 1949/50 Fazakerley late Mk1s and early Mk2s, in new and used condition.

Long Branch and Savage rifles are commonly found in Commonwealth countries because of the way WW2 finished up. UKicon probably had a huge pile of unused Savage rifles, as these would have arrived slightly later than the UK production rifles, and the rifle requirement had dropped significantly with the advent of the Sten gun in its millions. The Canadian army substantially demobilised whilst it was in Europe. The Canadians appear to have sent the demobbed soldiers home, but left the equipment for UK to distribute amongst the liberated European countries. Obviously made no sense to ship stuff to Canadaicon that would never be used in the small post-war defence forces. Thus Long Branch rifles seem to turn up in European countries - Greece, Italyicon, France, Belgiumicon, Netherlands, etc - whilst Savage rifles seem to have been shipped to overseas recipients - India, Africa, Middle East, etc.