| Sold | Grade | Monthly Average |
| Jul 2024 | 7.5 | $33.25 |
| Nov 2009 | 9.4 | $4.70 |
| Mar 2009 | 9.4 | $5.40 |
| Nov 2007 | 9.4 | $4.80 |
| Sep 2005 | 9.4 | $4.20 |
| Nov 2004 | 9.4 | $7.00 |
| Apr 2015 | 9.0 | $7.00 |
| Jan 2019 | 8.0 | $8.00 |
| Oct 2018 | 8.0 | $8.00 |
| Apr 2017 | 8.0 | $7.20 |
| Feb 2016 | 8.0 | $6.40 |
| Nov 2014 | 8.0 | $6.40 |
| Dec 2012 | 8.0 | $6.40 |
| Sep 2011 | 8.0 | $6.40 |
| Mar 2020 | 7.5 | $7.49 |
| Apr 2020 | 6.5 | $7.00 |
| Jan 2019 | 6.5 | $6.49 |
| Jan 2024 | 6.0 | $36.00 |