| Sold | Grade | Monthly Average |
| Jan 2026 | 6.0 | $2.80 |
| Aug 2025 | 6.0 | $2.90 |
| Oct 2025 | 5.0 | $2.70 |
| Sep 2025 | 4.0 | $2.70 |
| Jan 2023 | 8.5 | $29.00 |
| Feb 2011 | 8.0 | $32.00 |
| Oct 2022 | 7.5 | $22.00 |
| May 2025 | 6.5 | $4.20 |
| Oct 2020 | 6.5 | $21.00 |
| Mar 2019 | 6.5 | $23.50 |
| Sep 2019 | 5.0 | $16.00 |
| Oct 2024 | 4.5 | $4.50 |
| Jan 2025 | 4.0 | $3.20 |
| Feb 2014 | 3.5 | $7.49 |
| Feb 2010 | 2.5 | $8.98 |
| May 2016 | 1.0 | $2.16 |