| Sold | Grade | Monthly Average |
| Feb 2011 | 9.4 | $4.00 |
| Sep 2011 | 8.0 | $3.20 |
| Nov 2020 | 6.5 | $2.60 |
| Jun 2025 | 6.0 | $1.00 |
| Apr 2018 | 6.0 | $3.00 |
| Mar 2018 | 6.0 | $3.00 |
| Jan 2017 | 6.0 | $3.60 |
| Jan 2014 | 6.0 | $2.40 |
| May 2021 | 4.5 | $2.20 |
| Jan 2018 | 4.5 | $1.70 |
| Dec 2019 | 4.0 | $2.00 |
| Jul 2019 | 4.0 | $2.00 |
| Mar 2019 | 4.0 | $2.00 |
| Jan 2018 | 4.0 | $1.70 |
| Apr 2022 | 3.5 | $2.00 |
| Feb 2020 | 3.5 | $2.00 |
| Apr 2022 | 3.0 | $2.00 |
| Aug 2013 | 2.0 | $0.80 |