| Sold | Grade | Monthly Average |
| Oct 2011 | 8.5 | $78.88 |
| Feb 2022 | 7.5 | $105.00 |
| Jan 2024 | 6.5 | $95.00 |
| Jan 2021 | 6.0 | $75.00 |
| Mar 2022 | 5.5 | $82.00 |
| Sep 2020 | 5.5 | $75.00 |
| Jul 2019 | 5.5 | $41.50 |
| Apr 2011 | 5.5 | $47.00 |
| Dec 2014 | 5.0 | $99.00 |
| Nov 2014 | 4.5 | $27.00 |
| Sep 2023 | 4.0 | $30.00 |
| Apr 2013 | 4.0 | $34.00 |
| Jan 2012 | 4.0 | $34.00 |
| Jan 2012 | 3.0 | $26.00 |
| Mar 2019 | 2.0 | $26.00 |