| Sold | Grade | Monthly Average |
| Apr 2026 | 4.0 | $3.60 |
| Aug 2016 | 8.0 | $19.50 |
| Aug 2019 | 6.0 | $9.00 |
| Jun 2021 | 4.0 | $5.30 |
| May 2020 | 4.0 | $2.40 |
| Dec 2017 | 4.0 | $3.60 |
| May 2013 | 3.5 | $3.30 |
| Jan 2012 | 3.5 | $3.70 |
| Aug 2018 | 3.0 | $2.75 |
| Sep 2024 | 2.5 | $3.60 |
| Jan 2016 | 2.5 | $2.49 |
| Nov 2025 | 2.0 | $2.65 |
| Aug 2017 | 2.0 | $1.89 |
| Mar 2012 | 2.0 | $2.40 |
| Feb 2009 | 2.0 | $3.80 |