| Sold | Grade | Monthly Average |
| May 2011 | 9.6 | $18.00 |
| Dec 2021 | 9.4 | $5.00 |
| Feb 2013 | 9.4 | $9.60 |
| Oct 2012 | 9.4 | $10.85 |
| Jun 2011 | 9.4 | $14.25 |
| May 2011 | 9.2 | $12.00 |
| Jan 2012 | 8.5 | $10.00 |
| Mar 2024 | 8.0 | $4.00 |
| May 2022 | 8.0 | $3.60 |
| Feb 2018 | 8.0 | $2.40 |
| Jan 2017 | 8.0 | $3.40 |
| Jun 2013 | 8.0 | $4.00 |
| Mar 2022 | 6.0 | $2.70 |
| Nov 2016 | 6.0 | $1.98 |
| Aug 2013 | 6.0 | $2.40 |
| Oct 2020 | 4.0 | $1.80 |