| Sold | Grade | Monthly Average |
| Sep 2021 | 8.0 | $8.90 |
| Jun 2011 | 8.0 | $7.60 |
| Mar 2017 | 7.5 | $7.49 |
| Sep 2020 | 7.0 | $7.00 |
| Feb 2019 | 6.5 | $7.25 |
| Feb 2025 | 6.0 | $7.30 |
| Aug 2023 | 6.0 | $6.00 |
| Sep 2021 | 6.0 | $6.80 |
| Dec 2019 | 6.0 | $6.50 |
| May 2014 | 6.0 | $6.00 |
| Aug 2019 | 5.5 | $5.49 |
| Feb 2018 | 5.0 | $1.80 |
| Dec 2016 | 2.0 | $2.00 |