| Sold | Grade | Monthly Average |
| Apr 2024 | 8.0 | $2.50 |
| Oct 2015 | 9.4 | $1.35 |
| Jun 2015 | 9.4 | $1.22 |
| Nov 2014 | 9.4 | $1.20 |
| Sep 2014 | 9.4 | $0.99 |
| Oct 2012 | 9.4 | $1.10 |
| Dec 2011 | 9.4 | $1.10 |
| Jun 2010 | 9.4 | $1.10 |
| Jan 2010 | 9.4 | $0.98 |
| Mar 2009 | 9.4 | $1.49 |
| Apr 2007 | 9.4 | $1.00 |
| Oct 2006 | 9.4 | $1.00 |
| Feb 2018 | 9.0 | $1.00 |
| Nov 2021 | 8.0 | $2.00 |
| May 2020 | 8.0 | $2.00 |
| Jun 2019 | 8.0 | $1.70 |
| Oct 2013 | 8.0 | $0.90 |
| Nov 2009 | 6.0 | $0.70 |
| Sep 2007 | 6.0 | $0.75 |