| Sold | Grade | Monthly Average |
| Feb 2013 | 9.4 | $2.70 |
| Nov 2011 | 9.4 | $3.00 |
| Aug 2017 | 8.0 | $2.40 |
| Oct 2015 | 8.0 | $1.60 |
| Jan 2015 | 8.0 | $2.40 |
| Aug 2014 | 8.0 | $2.10 |
| Aug 2010 | 8.0 | $1.60 |
| Jul 2010 | 8.0 | $0.90 |
| May 2009 | 8.0 | $1.49 |
| Nov 2007 | 8.0 | $0.86 |
| May 2025 | 6.0 | $2.50 |
| Nov 2024 | 6.0 | $2.50 |
| Jan 2024 | 6.0 | $2.50 |
| Apr 2022 | 6.0 | $2.00 |
| May 2020 | 6.0 | $2.00 |
| Mar 2020 | 6.0 | $2.00 |
| Jun 2019 | 6.0 | $1.70 |
| Mar 2019 | 6.0 | $1.70 |
| Dec 2018 | 6.0 | $1.70 |
| Mar 2014 | 6.0 | $1.60 |
| Jul 2010 | 6.0 | $1.00 |
| Nov 2015 | 2.0 | $1.22 |