| Sold | Grade | Monthly Average |
| Dec 2024 | 9.4 | $59.97 |
| Oct 2022 | 9.4 | $81.98 |
| Jun 2020 | 9.4 | $74.95 |
| Dec 2019 | 9.4 | $74.95 |
| Oct 2018 | 9.4 | $88.00 |
| Aug 2017 | 9.4 | $89.00 |
| Jan 2016 | 9.4 | $49.46 |
| May 2015 | 9.4 | $49.46 |
| Apr 2015 | 9.4 | $49.46 |
| Jan 2015 | 9.4 | $49.46 |
| Dec 2014 | 9.4 | $54.95 |
| Nov 2014 | 9.4 | $54.95 |
| Dec 2024 | 8.0 | $47.40 |
| Jan 2019 | 8.0 | $70.00 |