It looked like a deal too good to be true, $72 for a round-trip business class ticket on South African Airways between Johannesburg and Abu Dhabi.  That's over $3,300 cheaper than the usual fare, so could it really be true? 

The airline held an online promotional sale at the end of February which had the offered fare to passengers. The airline said Thursday that it erroneously published the incorrect fare and that it was refunding customers who had snapped up the tickets. Some 640 bookings were affected, it said.