| Sold | Grade | Monthly Average |
| Dec 2025 | 9.4 | $34.20 |
| Dec 2025 | 9.4 | $34.20 |
| Nov 2018 | 9.4 | $67.46 |
| Nov 2013 | 9.4 | $54.99 |
| Jul 2011 | 9.4 | $35.00 |
| Mar 2010 | 9.4 | $27.00 |
| Nov 2009 | 9.4 | $30.00 |
| May 2009 | 9.4 | $35.00 |
| Feb 2019 | 8.0 | $59.00 |
| Feb 2018 | 8.0 | $69.00 |
| Jun 2017 | 8.0 | $59.00 |
| Jan 2013 | 8.0 | $40.00 |
| Dec 2012 | 8.0 | $36.00 |
| Nov 2024 | 6.5 | $62.00 |
| Nov 2018 | 6.0 | $54.00 |