| Sold | Grade | Monthly Average |
| Aug 2017 | 5.5 | $6.00 |
| Sep 2011 | 4.5 | $4.40 |
| Feb 2023 | 4.0 | $4.00 |
| Feb 2021 | 4.0 | $3.60 |
| Jul 2019 | 4.0 | $3.20 |
| Jan 2018 | 4.0 | $4.40 |
| Feb 2020 | 3.5 | $2.70 |
| Aug 2018 | 3.5 | $3.50 |
| Apr 2017 | 3.5 | $3.20 |
| Mar 2015 | 3.5 | $4.00 |
| Oct 2018 | 3.0 | $2.80 |
| Jan 2018 | 3.0 | $1.70 |
| Apr 2022 | 2.0 | $2.00 |
| Oct 2021 | 2.0 | $2.00 |
| Jul 2021 | 2.0 | $2.00 |
| Sep 2012 | 2.0 | $2.60 |
| Jul 2010 | 2.0 | $2.20 |
| Feb 2012 | 1.0 | $1.20 |