| Sold | Grade | Monthly Average |
| Jan 2021 | 6.5 | $68.00 |
| Mar 2012 | 6.0 | $57.00 |
| Aug 2010 | 6.0 | $72.00 |
| Jun 2021 | 5.0 | $55.70 |
| Jan 2010 | 5.0 | $49.40 |
| Sep 2020 | 4.5 | $36.00 |
| Aug 2021 | 3.0 | $19.50 |
| Jul 2021 | 3.0 | $18.53 |
| Jun 2021 | 3.0 | $25.00 |
| Sep 2019 | 3.0 | $27.00 |
| Aug 2022 | 2.5 | $18.25 |
| Jul 2019 | 2.0 | $19.00 |
| Aug 2016 | 1.0 | $9.00 |
| Feb 2019 | 0.5 | $4.70 |
| Jan 2013 | 0.5 | $4.95 |
| Oct 2011 | 0.5 | $7.49 |