| Sold | Grade | Monthly Average |
| Apr 2019 | 4.5 | $6.60 |
| Jan 2019 | 4.0 | $6.00 |
| Sep 2017 | 4.0 | $5.94 |
| May 2021 | 3.0 | $6.00 |
| Aug 2017 | 3.0 | $4.50 |
| Sep 2015 | 3.0 | $5.00 |
| Mar 2015 | 2.5 | $5.10 |
| May 2022 | 2.0 | $2.40 |
| Apr 2021 | 2.0 | $2.40 |
| Jul 2020 | 2.0 | $2.40 |
| Nov 2011 | 2.0 | $3.80 |
| Jun 2021 | 1.0 | $2.00 |