| Sold | Grade | Monthly Average |
| Jan 2015 | 8.5 | $141.00 |
| Sep 2013 | 8.0 | $71.10 |
| Mar 2013 | 8.0 | $60.00 |
| Jul 2025 | 7.0 | $60.00 |
| Apr 2022 | 6.5 | $44.00 |
| Jun 2024 | 6.0 | $50.40 |
| Sep 2021 | 6.0 | $72.00 |
| Apr 2018 | 6.0 | $59.00 |
| Nov 2015 | 6.0 | $59.00 |
| Oct 2011 | 6.0 | $45.00 |
| Sep 2023 | 4.0 | $43.00 |
| Jan 2021 | 4.0 | $48.00 |
| Dec 2020 | 4.0 | $57.00 |
| Jan 2017 | 4.0 | $40.00 |