Ann: MBN Company Update 7 November 2013.pdf , page-13

As it has been pointed out in previous posts, a stockpile of 12,500 tonnes of nickel concentrate is not going to be a panacea to MBN's financial issues.

Ni concentrate grade at MBN is 13-14% Ni, with 89% payable
So a quick calculation indicates that the concentrate will contain ~ 1,500-1,600t of payable Ni (~US$20-22m in value)

Note this ignores the copper/cobalt in the concentrate, but makes no allowance for other costs (transport, handling)