| Sold | Grade | Monthly Average |
| Nov 2020 | 9.4 | $43.99 |
| Sep 2015 | 9.4 | $99.99 |
| Nov 2010 | 9.4 | $40.00 |
| Sep 2024 | 9.2 | $90.00 |
| Aug 2023 | 9.2 | $57.00 |
| Jan 2025 | 8.5 | $68.00 |
| Jul 2022 | 8.0 | $56.00 |
| Apr 2021 | 8.0 | $44.00 |
| Sep 2017 | 8.0 | $49.00 |
| Jun 2017 | 8.0 | $39.60 |
| Dec 2016 | 8.0 | $23.00 |
| Nov 2024 | 7.5 | $45.00 |
| Jun 2021 | 7.5 | $65.00 |
| Jun 2022 | 6.0 | $105.00 |
| May 2025 | 5.5 | $29.00 |
| Feb 2019 | 5.5 | $26.00 |
| May 2025 | 4.5 | $26.00 |
| Jun 2019 | 4.0 | $19.80 |
| Mar 2011 | 4.0 | $14.40 |
| Apr 2014 | 2.0 | $9.90 |