| Sold | Grade | Monthly Average |
| Jul 2026 | 1.8 | $2.65 |
| Feb 2015 | 8.0 | $13.50 |
| Apr 2026 | 6.5 | $10.21 |
| Jul 2021 | 6.0 | $9.00 |
| Nov 2019 | 5.0 | $6.48 |
| Feb 2023 | 4.0 | $6.00 |
| Aug 2022 | 4.0 | $6.00 |
| Oct 2018 | 4.0 | $6.00 |
| Mar 2025 | 3.5 | $5.00 |
| Jun 2010 | 3.5 | $4.30 |
| Aug 2017 | 3.0 | $4.20 |
| Oct 2018 | 2.5 | $3.60 |
| Nov 2021 | 2.0 | $2.70 |