| Sold | Grade | Monthly Average |
| May 2026 | 6.0 | $2.65 |
| Nov 2018 | 8.0 | $1.53 |
| Sep 2018 | 8.0 | $1.70 |
| Feb 2017 | 8.0 | $1.70 |
| Aug 2015 | 8.0 | $1.35 |
| Apr 2013 | 8.0 | $1.20 |
| Nov 2012 | 8.0 | $0.90 |
| Jan 2026 | 6.0 | $2.78 |
| Aug 2025 | 6.0 | $2.65 |
| Dec 2024 | 6.0 | $1.00 |
| Apr 2024 | 6.0 | $1.00 |
| Sep 2023 | 6.0 | $2.50 |
| Mar 2023 | 6.0 | $2.50 |
| Nov 2022 | 6.0 | $2.00 |
| Jul 2022 | 6.0 | $2.00 |
| Apr 2021 | 6.0 | $2.00 |
| Feb 2021 | 6.0 | $2.00 |
| Jan 2020 | 6.0 | $2.00 |
| Aug 2013 | 6.0 | $0.80 |
| Apr 2012 | 6.0 | $0.75 |
| Sep 2025 | 4.0 | $2.65 |