| Sold | Grade | Monthly Average |
| Sep 2021 | 9.4 | $49.95 |
| Jul 2018 | 9.4 | $49.95 |
| Dec 2015 | 9.4 | $57.00 |
| Mar 2014 | 9.4 | $19.95 |
| Jun 2011 | 9.4 | $20.00 |
| Oct 2009 | 9.4 | $20.00 |
| Dec 2008 | 9.4 | $27.00 |
| May 2025 | 6.0 | $10.00 |
| Nov 2021 | 6.0 | $30.00 |
| Aug 2016 | 6.0 | $30.00 |
| Nov 2014 | 6.0 | $11.75 |
| Aug 2012 | 6.0 | $12.00 |
| Jul 2023 | 4.0 | $16.00 |
| Nov 2022 | 4.0 | $11.99 |