| Sold | Grade | Monthly Average |
| Dec 2012 | 9.4 | $1.80 |
| Jun 2010 | 9.4 | $1.13 |
| Oct 2009 | 9.4 | $1.00 |
| Jun 2009 | 9.4 | $1.26 |
| Dec 2008 | 9.4 | $1.49 |
| Nov 2006 | 9.4 | $2.40 |
| Jan 2023 | 9.0 | $14.00 |
| May 2025 | 8.0 | $5.00 |
| Nov 2024 | 8.0 | $3.60 |
| Oct 2022 | 8.0 | $9.60 |
| Dec 2019 | 8.0 | $4.56 |
| Oct 2015 | 8.0 | $1.35 |
| Nov 2013 | 8.0 | $1.20 |
| Jan 2013 | 8.0 | $1.20 |
| Dec 2011 | 8.0 | $1.25 |
| Mar 2010 | 8.0 | $0.90 |
| Dec 2007 | 8.0 | $2.00 |
| Nov 2023 | 7.0 | $6.66 |
| Jun 2019 | 6.0 | $4.49 |
| Mar 2019 | 6.0 | $4.20 |
| Apr 2011 | 6.0 | $2.40 |