| Sold | Grade | Monthly Average |
| Aug 2025 | 9.4 | $37.00 |
| Sep 2024 | 9.4 | $40.00 |
| Apr 2022 | 9.4 | $99.95 |
| May 2020 | 9.4 | $59.99 |
| Mar 2018 | 9.4 | $58.00 |
| Nov 2017 | 9.4 | $47.95 |
| Sep 2016 | 9.4 | $59.00 |
| Apr 2016 | 9.4 | $47.95 |
| Mar 2016 | 9.4 | $47.95 |
| Jan 2016 | 9.4 | $47.95 |
| Aug 2015 | 9.4 | $47.95 |
| Jul 2014 | 9.4 | $43.16 |
| Apr 2014 | 9.4 | $45.56 |
| Nov 2012 | 9.4 | $37.59 |
| Oct 2012 | 9.4 | $46.90 |
| Jul 2012 | 9.4 | $42.49 |
| Apr 2012 | 9.4 | $44.99 |
| Dec 2024 | 8.0 | $17.40 |
| Oct 2024 | 8.0 | $29.00 |
| May 2025 | 7.5 | $23.00 |
| Sep 2020 | 6.0 | $36.00 |