| Sold | Grade | Monthly Average |
| Apr 2011 | 9.4 | $40.00 |
| Jul 2010 | 9.4 | $23.00 |
| Sep 2021 | 8.0 | $79.00 |
| Sep 2019 | 8.0 | $79.00 |
| Sep 2014 | 8.0 | $40.00 |
| Dec 2013 | 8.0 | $43.00 |
| Mar 2020 | 6.0 | $59.00 |
| Dec 2019 | 6.0 | $59.00 |
| Jun 2016 | 6.0 | $30.00 |
| Aug 2013 | 6.0 | $30.00 |
| Oct 2011 | 6.0 | $24.00 |
| Oct 2018 | 4.0 | $48.00 |
| Oct 2015 | 4.0 | $22.50 |