| Sold | Grade | Monthly Average |
| Jan 2024 | 2.0 | $2.50 |
| Feb 2013 | 8.0 | $8.80 |
| Jan 2019 | 6.0 | $6.50 |
| Apr 2020 | 4.5 | $4.40 |
| Jun 2022 | 4.0 | $4.80 |
| Apr 2021 | 4.0 | $4.00 |
| Jun 2020 | 4.0 | $4.00 |
| Oct 2018 | 4.0 | $4.40 |
| Apr 2018 | 4.0 | $4.00 |
| Jul 2014 | 3.5 | $3.60 |
| Mar 2021 | 3.0 | $2.80 |
| Aug 2016 | 3.0 | $3.60 |
| Jul 2014 | 3.0 | $3.20 |
| Jan 2012 | 3.0 | $3.00 |
| Sep 2021 | 2.0 | $2.40 |
| Jan 2010 | 2.0 | $1.20 |
| Dec 2013 | 1.8 | $2.10 |