| Sold | Grade | Monthly Average |
| Jun 2019 | 9.4 | $76.00 |
| Jul 2012 | 9.4 | $6.49 |
| Jul 2017 | 9.2 | $60.00 |
| Jul 2018 | 9.0 | $99.95 |
| Sep 2017 | 8.5 | $75.00 |
| Nov 2015 | 8.5 | $140.00 |
| Sep 2013 | 8.5 | $21.50 |
| Dec 2015 | 8.0 | $7.60 |
| Apr 2018 | 7.5 | $40.09 |
| Apr 2016 | 7.5 | $100.00 |
| Jun 2015 | 7.5 | $14.25 |
| Mar 2014 | 7.5 | $18.75 |
| Feb 2019 | 6.5 | $30.00 |
| Oct 2013 | 6.5 | $16.25 |
| May 2023 | 6.0 | $4.56 |
| Jul 2020 | 6.0 | $4.56 |