| Sold | Grade | Monthly Average |
| Apr 2010 | 9.4 | $1.10 |
| Feb 2009 | 9.4 | $1.49 |
| Oct 2023 | 8.0 | $3.20 |
| Jul 2023 | 8.0 | $3.20 |
| Apr 2022 | 8.0 | $3.20 |
| Dec 2020 | 8.0 | $3.20 |
| Feb 2018 | 8.0 | $2.65 |
| Jan 2018 | 8.0 | $2.65 |
| May 2017 | 8.0 | $2.40 |
| Sep 2014 | 8.0 | $1.20 |
| Mar 2011 | 8.0 | $1.05 |
| Dec 2010 | 8.0 | $0.90 |
| May 2010 | 8.0 | $0.90 |
| Jan 2023 | 6.0 | $2.40 |
| Jun 2021 | 6.0 | $2.40 |
| Feb 2018 | 6.0 | $1.95 |
| Oct 2017 | 6.0 | $1.80 |
| Jul 2016 | 6.0 | $2.20 |
| Jan 2024 | 4.0 | $2.50 |