| Sold | Grade | Monthly Average |
| Oct 2015 | 9.4 | $6.99 |
| Aug 2015 | 9.4 | $6.99 |
| Sep 2014 | 9.4 | $6.64 |
| Feb 2013 | 9.4 | $6.99 |
| Apr 2011 | 9.4 | $6.64 |
| May 2017 | 9.2 | $20.00 |
| Dec 2014 | 9.2 | $5.00 |
| Mar 2016 | 8.5 | $8.49 |
| Dec 2013 | 8.5 | $7.00 |
| Dec 2017 | 8.0 | $25.38 |
| May 2016 | 8.0 | $8.00 |
| Jun 2013 | 8.0 | $5.49 |
| May 2012 | 8.0 | $5.49 |
| Apr 2020 | 7.5 | $8.00 |
| Jun 2020 | 7.0 | $6.00 |
| Nov 2023 | 6.5 | $13.00 |
| Oct 2018 | 6.5 | $13.00 |
| Aug 2020 | 6.0 | $12.00 |
| Nov 2023 | 4.0 | $7.60 |
| Jul 2022 | 4.0 | $8.00 |
| Sep 2021 | 4.0 | $8.00 |