| Sold | Grade | Monthly Average |
| Oct 2025 | 0.5 | $9.20 |
| Oct 2017 | 6.0 | $47.00 |
| Sep 2012 | 5.5 | $29.00 |
| Jul 2020 | 4.5 | $60.00 |
| Feb 2014 | 4.0 | $14.85 |
| Sep 2010 | 4.0 | $38.50 |
| May 2023 | 3.5 | $27.00 |
| Feb 2023 | 3.0 | $15.50 |
| Apr 2024 | 2.5 | $30.40 |
| May 2023 | 2.5 | $9.00 |
| Jan 2021 | 2.5 | $36.00 |
| Jul 2014 | 2.5 | $14.99 |
| Jun 2023 | 2.0 | $10.00 |
| Feb 2022 | 2.0 | $21.00 |
| Jul 2021 | 2.0 | $27.00 |
| Jun 2011 | 2.0 | $21.00 |
| Feb 2015 | 1.8 | $18.45 |
| Aug 2015 | 1.0 | $13.25 |