| Sold | Grade | Monthly Average |
| Oct 2023 | 2.5 | $24.00 |
| Nov 2020 | 2.0 | $49.00 |
| Jul 2019 | 2.0 | $37.00 |
| Dec 2018 | 2.0 | $18.00 |
| Sep 2017 | 2.0 | $35.72 |
| Jan 2015 | 2.0 | $29.70 |
| Sep 2013 | 2.0 | $29.70 |
| Sep 2024 | 1.8 | $40.00 |
| Jun 2021 | 1.8 | $35.00 |
| Mar 2025 | 1.5 | $40.00 |
| May 2019 | 1.5 | $39.90 |
| Aug 2018 | 1.0 | $13.00 |
| Jan 2016 | 1.0 | $17.50 |