| Sold | Grade | Monthly Average |
| Apr 2013 | 9.4 | $3.30 |
| Mar 2012 | 9.4 | $2.30 |
| Jan 2012 | 9.4 | $2.30 |
| Jun 2011 | 9.4 | $3.00 |
| Mar 2025 | 8.0 | $3.20 |
| Apr 2017 | 8.0 | $2.10 |
| May 2014 | 8.0 | $4.00 |
| Jan 2013 | 8.0 | $2.00 |
| Sep 2010 | 8.0 | $1.60 |
| Jul 2010 | 8.0 | $1.10 |
| May 2010 | 8.0 | $0.90 |
| May 2005 | 8.0 | $0.88 |
| May 2024 | 6.0 | $3.00 |
| Feb 2023 | 6.0 | $3.00 |
| Sep 2021 | 6.0 | $3.00 |
| May 2019 | 6.0 | $3.00 |
| Jan 2018 | 6.0 | $2.80 |
| Mar 2017 | 6.0 | $1.80 |
| Oct 2011 | 6.0 | $2.00 |
| Dec 2010 | 6.0 | $2.60 |
| Sep 2007 | 6.0 | $2.00 |
| Nov 2012 | 4.0 | $1.90 |