Felipe,
Free range, low fence are in Namibia.
250 000ha NGARANGOMBE Conservancy Namibia near Otavi.
Largest free ranging herd of Eland
Willem is probably right on the money about the "cheaper" trophy fee after another flight from JNB.
The fees will be a little lower where the Eland is found in its natural habitat.
Easier to raise, less loses, etc. etc.
Bottom line, you have to add all the costs up to compare ($) properly and also, but that is not the whole question really. What style of hunt do you want?
There are lots of Eland in RSA and plenty of folks on AH that offer them on their price lists.
E is right about distribution. There are big Eland. So, does your "best area" have to have record book animals or good representative animals.
Namhunter has it on RW list too.
But, not everyone lists their trophies either.