| Sold | Grade | Monthly Average |
| May 2016 | 9.4 | $2.30 |
| Aug 2015 | 9.4 | $2.70 |
| Apr 2015 | 9.4 | $1.10 |
| May 2012 | 9.4 | $1.35 |
| Oct 2011 | 9.4 | $1.10 |
| Jun 2011 | 9.4 | $1.10 |
| Jan 2011 | 9.4 | $1.10 |
| Nov 2008 | 9.4 | $1.99 |
| Feb 2008 | 9.4 | $1.99 |
| Aug 2003 | 9.4 | $1.50 |
| Jul 2003 | 9.4 | $1.50 |
| Apr 2001 | 9.4 | $6.00 |
| Mar 2016 | 8.0 | $1.80 |
| Oct 2015 | 8.0 | $1.80 |
| Jul 2013 | 8.0 | $1.00 |