| Sold | Grade | Monthly Average |
| Apr 2015 | 8.5 | $41.80 |
| Sep 2013 | 8.0 | $40.60 |
| Mar 2013 | 8.0 | $43.00 |
| Oct 2011 | 8.0 | $45.90 |
| Oct 2016 | 7.0 | $15.99 |
| Jun 2025 | 6.5 | $13.00 |
| Oct 2024 | 6.5 | $33.00 |
| Feb 2023 | 6.0 | $19.50 |
| Dec 2021 | 5.5 | $23.00 |
| Jul 2023 | 5.0 | $45.00 |
| Jan 2026 | 4.0 | $29.00 |
| Sep 2020 | 4.0 | $23.00 |
| Dec 2014 | 3.0 | $20.50 |