| Sold | Grade | Monthly Average |
| Oct 2010 | 9.4 | $1.49 |
| Oct 2008 | 9.4 | $1.49 |
| Jan 2008 | 9.4 | $1.49 |
| Sep 2007 | 9.4 | $2.40 |
| Dec 2006 | 9.4 | $2.40 |
| Nov 2006 | 9.4 | $2.95 |
| Oct 2006 | 9.4 | $2.95 |
| Jul 2021 | 8.0 | $4.00 |
| Mar 2019 | 8.0 | $4.40 |
| Jun 2018 | 8.0 | $4.00 |
| May 2017 | 8.0 | $2.40 |
| Sep 2014 | 8.0 | $1.30 |
| Apr 2014 | 8.0 | $1.20 |
| Aug 2013 | 8.0 | $2.85 |
| Nov 2024 | 6.0 | $3.20 |
| Feb 2023 | 6.0 | $3.00 |
| Jul 2022 | 6.0 | $3.00 |
| Sep 2020 | 6.0 | $3.00 |
| May 2020 | 6.0 | $3.30 |
| Mar 2020 | 6.0 | $3.00 |
| Aug 2019 | 6.0 | $3.15 |