| Sold | Grade | Monthly Average |
| Dec 2020 | 6.0 | $68.00 |
| Jan 2018 | 4.5 | $24.00 |
| Dec 2017 | 4.5 | $11.25 |
| Apr 2015 | 4.0 | $21.50 |
| Aug 2011 | 4.0 | $22.00 |
| Jan 2023 | 3.5 | $26.00 |
| Feb 2018 | 3.0 | $29.00 |
| Dec 2017 | 2.5 | $6.80 |
| Aug 2010 | 2.5 | $15.75 |
| Jul 2010 | 2.5 | $14.25 |
| Jun 2023 | 1.5 | $13.00 |
| Aug 2019 | 1.0 | $9.40 |