| Sold | Grade | Monthly Average |
| Jan 2026 | 2.0 | $2.65 |
| Aug 2017 | 6.5 | $9.68 |
| Feb 2023 | 5.5 | $8.49 |
| Aug 2025 | 5.0 | $7.60 |
| Jul 2017 | 5.0 | $2.91 |
| Jul 2014 | 5.0 | $5.80 |
| Aug 2024 | 4.0 | $7.60 |
| Jan 2023 | 4.0 | $6.30 |
| Jun 2022 | 4.0 | $6.30 |
| Jan 2019 | 4.0 | $15.50 |
| May 2017 | 4.0 | $2.65 |
| Sep 2018 | 3.5 | $8.40 |
| May 2014 | 3.5 | $2.76 |
| Nov 2023 | 3.0 | $2.99 |
| Oct 2015 | 3.0 | $2.10 |
| Jul 2014 | 3.0 | $2.70 |
| Feb 2013 | 2.5 | $2.40 |
| Sep 2022 | 2.0 | $2.10 |
| Jul 2021 | 2.0 | $2.10 |
| Mar 2012 | 2.0 | $2.20 |
| Sep 2019 | 1.5 | $2.00 |
| May 2015 | 1.5 | $1.20 |