These are the first Lukas I've looked at on 130 point in chronological order. Not trying to argue the point but I was surprised to hear that a tonne had sold in the $70 range ( I assumed you were talking in AUD). Apologies if I'm mistaken.
92
82
76
78
82
75
110
101
73
All US dollars
92
82
76
78
82
75
110
101
73
All US dollars