It appears that JNB fares have increased.
New BA fare that corresponds with what I see in the online booking engine.
V FARE BASIS BK FARE TRAVEL-TICKET AP MINMAX RTG
1 DONE4 D‡R 7233.00 ---- -/‡ -/12M RW01
PASSENGER TYPE-ADT AUTO PRICE-YES
FROM-JNB TO-JNB CXR-BA TVL-22DEC17 RULE-3015 RWR1/334
FARE BASIS-DONE4 SPECIAL FARE DIS-E VENDOR-ATP
FARE TYPE-BRW RT-BUSINESS CLASS AROUND THE WORLD
ZAR102000.00 0047 E31OCT17 D-INFINITY FC-DONE4 FN-
SYSTEM DATES - CREATED 30OCT17/1118 EXPIRES INFINITY
PUBLISHED RTG JNB-JNB/BA47 /TAR-RWRG EF-31OCT17 DIS-INDEF
OLD QF fare still showing in EF
V FARE BASIS BK FARE TRAVEL-TICKET AP MINMAX RTG
1 DONE4 D‡R 6269.00 ---- -/‡ -/12M RW01
PASSENGER TYPE-ADT AUTO PRICE-YES
FROM-JNB TO-JNB CXR-QF TVL-22DEC17 RULE-3015 RWR2/346
FARE BASIS-DONE4 SPECIAL FARE DIS-E VENDOR-ATP
FARE TYPE-BRW RT-BUSINESS CLASS AROUND THE WORLD
ZAR 88410.00 0047 E01DEC16 D-INFINITY FC-DONE4 FN-
SYSTEM DATES - CREATED 09NOV16/2127 EXPIRES INFINITY
PUBLISHED RTG JNB-JNB/QF47 /TAR-RWRG1 EF-01DEC16 DIS-INDEF