| Sold | Grade | Monthly Average |
| Jan 2012 | 9.2 | $13.40 |
| Sep 2012 | 7.0 | $5.70 |
| Jan 2015 | 6.5 | $4.30 |
| Apr 2026 | 6.0 | $5.00 |
| Jan 2023 | 6.0 | $7.20 |
| Aug 2022 | 6.0 | $7.20 |
| Aug 2022 | 4.5 | $4.70 |
| Mar 2021 | 4.0 | $4.20 |
| Feb 2018 | 4.0 | $5.75 |
| Feb 2014 | 4.0 | $2.00 |
| Feb 2013 | 4.0 | $2.20 |
| Nov 2009 | 4.0 | $1.20 |
| May 2002 | 4.0 | $2.75 |
| Jun 2022 | 3.5 | $3.40 |
| Aug 2017 | 3.0 | $2.07 |
| Apr 2012 | 3.0 | $1.10 |
| Feb 2021 | 2.5 | $2.37 |
| Sep 2020 | 2.0 | $2.10 |
| Feb 2016 | 2.0 | $1.60 |
| Jul 2015 | 2.0 | $1.75 |
| Mar 2011 | 2.0 | $1.05 |