| Sold | Grade | Monthly Average |
| Sep 2016 | 8.0 | $3.60 |
| Aug 2011 | 8.0 | $2.88 |
| Jun 2024 | 7.0 | $2.80 |
| Jun 2025 | 6.0 | $4.80 |
| Dec 2015 | 6.0 | $2.70 |
| Jan 2014 | 6.0 | $2.40 |
| Apr 2010 | 6.0 | $3.24 |
| Sep 2021 | 5.0 | $2.49 |
| May 2021 | 4.5 | $2.20 |
| Apr 2022 | 4.0 | $2.00 |
| Jan 2018 | 4.0 | $1.70 |
| Sep 2016 | 4.0 | $1.60 |
| Mar 2019 | 2.0 | $1.70 |
| Aug 2013 | 2.0 | $0.80 |
| Jul 2005 | 2.0 | $0.75 |
| May 2005 | 2.0 | $0.75 |