| Sold | Grade | Monthly Average |
| Nov 2015 | 9.4 | $1.35 |
| Jul 2014 | 9.4 | $1.30 |
| Apr 2012 | 9.4 | $1.70 |
| Feb 2012 | 9.4 | $1.30 |
| Aug 2011 | 9.4 | $1.10 |
| Nov 2010 | 9.4 | $1.30 |
| Sep 2009 | 9.4 | $3.20 |
| Jun 2009 | 9.4 | $3.20 |
| Jun 2016 | 8.0 | $1.35 |
| Jan 2016 | 8.0 | $1.35 |
| Apr 2014 | 8.0 | $1.00 |
| Mar 2014 | 8.0 | $0.90 |
| Dec 2010 | 8.0 | $1.00 |
| Oct 2010 | 8.0 | $0.90 |
| Nov 2007 | 8.0 | $2.60 |