| Sold | Grade | Monthly Average |
| May 2026 | 1.0 | $2.57 |
| Mar 2011 | 6.0 | $16.50 |
| Feb 2024 | 4.0 | $10.45 |
| Sep 2021 | 4.0 | $11.00 |
| Sep 2020 | 4.0 | $11.00 |
| Aug 2025 | 3.5 | $8.00 |
| Jun 2020 | 3.5 | $7.00 |
| Dec 2019 | 3.5 | $6.40 |
| Nov 2018 | 3.0 | $7.70 |
| Aug 2014 | 2.5 | $9.10 |
| Jul 2012 | 2.5 | $8.20 |
| May 2023 | 2.0 | $5.00 |
| Jun 2022 | 2.0 | $5.00 |
| Oct 2019 | 2.0 | $4.00 |
| Jun 2019 | 2.0 | $4.00 |
| Dec 2018 | 2.0 | $5.49 |
| Dec 2020 | 1.8 | $2.88 |
| Feb 2019 | 0.5 | $1.70 |