| Sold | Grade | Monthly Average |
| Jun 2026 | 2.0 | $13.25 |
| Sep 2016 | 4.0 | $14.50 |
| Sep 2024 | 3.5 | $8.80 |
| Jun 2024 | 3.5 | $8.80 |
| Apr 2022 | 3.5 | $8.80 |
| Sep 2015 | 3.0 | $7.70 |
| Jan 2024 | 2.0 | $5.49 |
| Apr 2023 | 2.0 | $5.49 |
| Mar 2017 | 2.0 | $5.49 |
| Jun 2020 | 1.8 | $5.20 |
| Mar 2016 | 1.5 | $4.49 |
| Jan 2015 | 1.0 | $3.20 |