| Sold | Grade | Monthly Average |
| Feb 2016 | 9.4 | $1.35 |
| Mar 2012 | 9.4 | $1.10 |
| Jun 2011 | 9.4 | $1.10 |
| Jul 2021 | 8.0 | $2.00 |
| Jan 2018 | 8.0 | $1.70 |
| Aug 2017 | 8.0 | $1.70 |
| Dec 2014 | 8.0 | $1.10 |
| Nov 2014 | 8.0 | $1.10 |
| Jan 2014 | 8.0 | $0.81 |
| Apr 2013 | 8.0 | $0.90 |
| Aug 2010 | 8.0 | $0.90 |
| Jun 2023 | 6.0 | $2.50 |
| Nov 2021 | 6.0 | $2.00 |
| Jul 2021 | 6.0 | $2.00 |
| Jun 2020 | 6.0 | $2.00 |