| Sold | Grade | Monthly Average |
| Apr 2010 | 9.4 | $1.10 |
| Feb 2009 | 9.4 | $1.49 |
| Jan 2009 | 9.4 | $1.49 |
| Nov 2004 | 9.4 | $1.50 |
| Jul 2004 | 9.4 | $1.00 |
| Jul 2023 | 8.0 | $4.00 |
| Jun 2021 | 8.0 | $5.20 |
| Dec 2020 | 8.0 | $4.80 |
| Dec 2017 | 8.0 | $3.20 |
| Jul 2017 | 8.0 | $2.40 |
| May 2017 | 8.0 | $1.80 |
| Aug 2014 | 8.0 | $0.90 |
| Sep 2013 | 8.0 | $0.90 |
| Jan 2023 | 6.0 | $3.00 |
| Apr 2022 | 6.0 | $3.00 |
| May 2021 | 6.0 | $3.90 |
| Feb 2014 | 6.0 | $0.80 |