| Sold | Grade | Monthly Average |
| Nov 2011 | 9.4 | $57.00 |
| May 2013 | 8.5 | $18.76 |
| Mar 2022 | 7.5 | $38.00 |
| Nov 2010 | 7.5 | $26.50 |
| Jan 2014 | 7.0 | $34.95 |
| Apr 2024 | 6.5 | $33.00 |
| Mar 2023 | 6.5 | $33.00 |
| Mar 2025 | 6.0 | $24.00 |
| Mar 2024 | 6.0 | $24.00 |
| Mar 2020 | 6.0 | $30.00 |
| Jun 2019 | 5.5 | $11.00 |
| Feb 2022 | 5.0 | $15.00 |
| Oct 2011 | 5.0 | $25.00 |
| Dec 2014 | 4.0 | $21.50 |