| Sold | Grade | Monthly Average |
| Sep 2026 | 1.8 | $10.50 |
| Aug 2026 | 1.0 | $6.00 |
| Jan 2025 | 4.0 | $54.00 |
| Jul 2022 | 4.0 | $17.00 |
| Jan 2016 | 4.0 | $28.00 |
| Sep 2018 | 3.0 | $22.00 |
| Nov 2025 | 2.5 | $13.00 |
| Jun 2024 | 2.5 | $6.00 |
| May 2015 | 2.0 | $14.75 |
| Feb 2015 | 2.0 | $14.75 |
| Jul 2014 | 2.0 | $8.49 |
| Aug 2010 | 2.0 | $14.25 |
| Jul 2010 | 2.0 | $12.75 |
| Aug 2017 | 1.5 | $8.58 |
| Jan 2022 | 1.0 | $5.60 |
| Jan 2025 | 0.5 | $2.80 |