| Sold | Grade | Monthly Average |
| Jul 2026 | 1.8 | $2.65 |
| Apr 2022 | 4.0 | $4.00 |
| Sep 2021 | 4.0 | $3.80 |
| May 2020 | 4.0 | $4.00 |
| Mar 2019 | 4.0 | $4.40 |
| Jan 2019 | 4.0 | $4.00 |
| May 2012 | 4.0 | $3.00 |
| Nov 2012 | 3.5 | $3.49 |
| Dec 2023 | 2.5 | $2.50 |
| Oct 2025 | 2.0 | $2.65 |
| Mar 2021 | 2.0 | $2.00 |
| Dec 2018 | 2.0 | $2.00 |
| Jan 2018 | 2.0 | $1.80 |
| Jun 2015 | 2.0 | $2.10 |