| Sold | Grade | Monthly Average |
| Sep 2022 | 6.0 | $6.00 |
| Apr 2020 | 6.0 | $6.00 |
| Jan 2019 | 6.0 | $6.00 |
| Aug 2018 | 6.0 | $5.70 |
| Jun 2013 | 5.5 | $4.30 |
| Oct 2012 | 5.5 | $4.30 |
| Mar 2023 | 4.0 | $4.00 |
| Sep 2021 | 4.0 | $3.80 |
| Dec 2020 | 4.0 | $3.60 |
| Jun 2019 | 4.0 | $4.40 |
| Sep 2016 | 4.0 | $3.20 |
| May 2016 | 4.0 | $3.20 |
| Oct 2011 | 3.5 | $2.49 |
| Jul 2012 | 3.0 | $2.20 |
| Sep 2021 | 2.5 | $2.28 |
| Jul 2017 | 2.5 | $1.90 |
| Jan 2024 | 2.0 | $2.50 |
| Mar 2020 | 2.0 | $2.00 |
| Jul 2020 | 1.8 | $2.00 |
| Feb 2010 | 1.8 | $1.00 |
| May 2011 | 1.0 | $1.10 |