| Sold | Grade | Monthly Average |
| Apr 2019 | 9.6 | $63.00 |
| Aug 2011 | 9.4 | $43.50 |
| Nov 2009 | 9.4 | $24.00 |
| Feb 2024 | 9.2 | $60.00 |
| Feb 2023 | 9.2 | $36.00 |
| Jun 2021 | 9.2 | $67.64 |
| Oct 2018 | 9.2 | $79.95 |
| Jan 2016 | 9.2 | $149.95 |
| Jun 2017 | 9.0 | $84.00 |
| May 2015 | 9.0 | $30.99 |
| Jan 2015 | 8.0 | $29.00 |
| Apr 2010 | 8.0 | $29.00 |
| Sep 2017 | 7.5 | $41.04 |