| Sold | Grade | Monthly Average |
| Mar 2023 | 7.0 | $22.00 |
| Sep 2015 | 6.0 | $10.59 |
| Dec 2013 | 5.5 | $8.50 |
| Sep 2022 | 5.0 | $4.80 |
| Aug 2023 | 4.0 | $4.00 |
| Jan 2020 | 4.0 | $5.00 |
| Aug 2019 | 4.0 | $6.00 |
| Dec 2018 | 4.0 | $8.55 |
| Jan 2017 | 3.5 | $3.20 |
| Apr 2014 | 2.5 | $2.40 |
| Mar 2023 | 2.0 | $2.50 |
| Nov 2022 | 2.0 | $2.00 |
| Mar 2021 | 2.0 | $2.49 |
| Feb 2021 | 2.0 | $2.49 |
| Nov 2020 | 2.0 | $2.49 |
| Dec 2017 | 2.0 | $2.00 |
| Jan 2010 | 1.8 | $1.20 |