| Sold | Grade | Monthly Average |
| Sep 2020 | 7.0 | $17.50 |
| Jan 2014 | 6.0 | $9.00 |
| Jun 2013 | 6.0 | $9.90 |
| Dec 2016 | 4.5 | $9.50 |
| Jul 2023 | 4.0 | $4.80 |
| Oct 2018 | 4.0 | $6.00 |
| Apr 2013 | 4.0 | $4.80 |
| Feb 2014 | 3.5 | $3.80 |
| Jul 2010 | 3.5 | $2.80 |
| Sep 2022 | 3.0 | $3.90 |
| Oct 2015 | 3.0 | $3.30 |
| Feb 2015 | 3.0 | $3.55 |
| Sep 2023 | 2.5 | $2.80 |
| Feb 2015 | 2.5 | $2.80 |
| Sep 2023 | 2.0 | $2.50 |
| Nov 2021 | 2.0 | $2.40 |
| Apr 2017 | 2.0 | $2.40 |
| Apr 2015 | 2.0 | $2.50 |
| Mar 2014 | 2.0 | $2.60 |
| Jul 2012 | 2.0 | $2.80 |