| Sold | Grade | Monthly Average |
| Jul 2015 | 5.5 | $55.80 |
| Feb 2013 | 5.0 | $46.50 |
| Jan 2019 | 4.5 | $76.00 |
| Aug 2021 | 4.0 | $44.00 |
| Oct 2025 | 3.5 | $46.00 |
| Dec 2015 | 3.5 | $35.00 |
| Mar 2022 | 3.0 | $38.00 |
| Jul 2018 | 3.0 | $22.00 |
| Apr 2022 | 2.5 | $30.00 |
| Jun 2015 | 2.5 | $10.90 |
| Mar 2022 | 2.0 | $20.00 |
| Mar 2014 | 2.0 | $28.35 |
| Jun 2020 | 1.8 | $28.00 |
| May 2022 | 1.5 | $17.50 |
| Jan 2021 | 1.5 | $16.50 |