| Sold | Grade | Monthly Average |
| Feb 2013 | 9.6 | $19.50 |
| Jan 2013 | 9.4 | $15.50 |
| Feb 2013 | 9.2 | $13.00 |
| Oct 2019 | 9.0 | $56.00 |
| Jul 2016 | 9.0 | $21.00 |
| Jan 2013 | 9.0 | $11.50 |
| Mar 2015 | 8.5 | $88.50 |
| May 2023 | 7.5 | $12.00 |
| Jun 2021 | 7.0 | $28.00 |
| Nov 2014 | 6.5 | $21.85 |
| Oct 2016 | 5.5 | $19.25 |
| May 2015 | 5.5 | $35.00 |
| Jun 2020 | 4.0 | $20.00 |
| Oct 2019 | 4.0 | $20.00 |
| Apr 2018 | 4.0 | $2.00 |