| Sold | Grade | Monthly Average |
| Oct 2016 | 9.4 | $15.08 |
| Jan 2010 | 9.4 | $4.30 |
| Dec 2009 | 9.4 | $4.29 |
| Sep 2009 | 9.4 | $5.60 |
| Jul 2009 | 9.4 | $5.60 |
| Nov 2008 | 9.4 | $5.60 |
| Sep 2008 | 9.4 | $5.60 |
| Apr 2008 | 9.4 | $5.60 |
| Mar 2008 | 9.4 | $5.60 |
| Aug 2013 | 9.2 | $4.20 |
| Jul 2013 | 9.2 | $4.75 |
| Apr 2013 | 9.2 | $4.30 |
| Dec 2012 | 9.2 | $7.70 |
| Jun 2023 | 6.0 | $15.00 |