| Sold | Grade | Monthly Average |
| Feb 2026 | 8.0 | $2.65 |
| Mar 2020 | 8.0 | $2.00 |
| Jun 2019 | 8.0 | $1.70 |
| Dec 2018 | 8.0 | $1.70 |
| Aug 2017 | 8.0 | $1.70 |
| Jan 2015 | 8.0 | $1.60 |
| Nov 2011 | 8.0 | $1.60 |
| Aug 2010 | 8.0 | $0.90 |
| Jul 2010 | 8.0 | $0.90 |
| May 2025 | 6.0 | $2.50 |
| Nov 2024 | 6.0 | $2.50 |
| Oct 2024 | 6.0 | $2.70 |
| Jan 2024 | 6.0 | $1.75 |
| Nov 2023 | 6.0 | $1.00 |
| Nov 2015 | 6.0 | $1.22 |
| Jun 2014 | 6.0 | $1.30 |
| Apr 2014 | 6.0 | $1.20 |
| Jul 2010 | 6.0 | $0.80 |