| Sold | Grade | Monthly Average |
| Dec 2020 | 5.0 | $8.60 |
| Feb 2013 | 5.0 | $9.60 |
| Jan 2021 | 4.0 | $7.20 |
| Jul 2018 | 4.0 | $8.00 |
| Jan 2014 | 4.0 | $8.00 |
| Aug 2013 | 4.0 | $8.00 |
| Feb 2013 | 3.5 | $3.61 |
| Jun 2017 | 3.0 | $4.49 |
| Jul 2017 | 2.5 | $3.80 |
| Apr 2021 | 2.0 | $3.20 |
| Sep 2019 | 2.0 | $3.20 |
| Apr 2011 | 2.0 | $4.00 |
| Mar 2024 | 1.5 | $2.50 |
| Feb 2020 | 1.5 | $2.20 |
| Jul 2013 | 1.0 | $1.20 |