| Sold | Grade | Monthly Average |
| Feb 2012 | 9.4 | $9.00 |
| Oct 2010 | 9.4 | $8.00 |
| Dec 2010 | 9.0 | $7.20 |
| Jun 2025 | 8.5 | $11.00 |
| Apr 2019 | 8.5 | $6.00 |
| Aug 2021 | 8.0 | $8.00 |
| Apr 2020 | 8.0 | $12.00 |
| Jun 2016 | 8.0 | $11.00 |
| Oct 2014 | 8.0 | $6.40 |
| Feb 2014 | 8.0 | $34.00 |
| Jul 2013 | 8.0 | $6.40 |
| Mar 2014 | 7.0 | $13.00 |
| Jun 2025 | 6.0 | $6.00 |
| Feb 2016 | 6.0 | $4.32 |
| Jun 2018 | 4.5 | $3.70 |
| Mar 2021 | 4.0 | $4.00 |