| Sold | Grade | Monthly Average |
| Jan 2012 | 9.4 | $6.49 |
| Oct 2011 | 9.4 | $5.49 |
| Dec 2023 | 9.0 | $9.00 |
| Sep 2017 | 8.0 | $11.50 |
| Aug 2017 | 8.0 | $8.00 |
| Jun 2015 | 8.0 | $8.00 |
| May 2014 | 8.0 | $8.20 |
| Jan 2014 | 8.0 | $6.40 |
| Jul 2010 | 8.0 | $4.40 |
| Feb 2023 | 7.0 | $7.00 |
| Oct 2024 | 6.0 | $6.00 |
| Jun 2022 | 6.0 | $6.00 |
| Aug 2021 | 6.0 | $6.00 |
| Dec 2023 | 5.0 | $5.00 |
| Apr 2021 | 4.0 | $4.00 |
| Feb 2020 | 4.0 | $4.40 |
| Mar 2019 | 4.0 | $4.00 |
| May 2021 | 2.0 | $2.00 |
| Apr 2015 | 2.0 | $2.00 |