| Sold | Grade | Monthly Average |
| Feb 2025 | 5.0 | $8.60 |
| Jan 2019 | 4.0 | $7.20 |
| May 2017 | 4.0 | $7.20 |
| Jul 2016 | 4.0 | $7.20 |
| Apr 2014 | 4.0 | $7.80 |
| Jan 2018 | 3.5 | $6.75 |
| Jan 2011 | 3.5 | $6.20 |
| Feb 2021 | 2.0 | $3.90 |
| Apr 2020 | 2.0 | $3.90 |
| Sep 2018 | 2.0 | $3.90 |
| Oct 2017 | 2.0 | $3.90 |
| Dec 2012 | 2.0 | $3.90 |
| May 2019 | 1.8 | $3.14 |