| Sold | Grade | Monthly Average |
| Feb 2026 | 2.5 | $12.50 |
| Feb 2011 | 5.5 | $12.75 |
| Mar 2017 | 4.0 | $9.60 |
| Dec 2024 | 3.5 | $19.35 |
| Sep 2013 | 3.5 | $7.60 |
| Mar 2023 | 3.0 | $12.25 |
| Jun 2025 | 2.5 | $8.55 |
| Mar 2018 | 2.5 | $5.42 |
| Aug 2024 | 2.0 | $8.80 |
| Oct 2020 | 2.0 | $9.60 |
| Oct 2010 | 2.0 | $4.80 |
| Feb 2019 | 1.8 | $8.30 |