| Sold | Grade | Monthly Average |
| Feb 2024 | 2.0 | $14.00 |
| Jul 2017 | 8.5 | $127.50 |
| Mar 2021 | 5.5 | $48.00 |
| Jan 2020 | 5.0 | $55.00 |
| Aug 2018 | 5.0 | $56.00 |
| Oct 2011 | 4.5 | $40.00 |
| Jul 2019 | 4.0 | $47.50 |
| Apr 2018 | 4.0 | $34.20 |
| Sep 2021 | 3.5 | $21.00 |
| May 2020 | 3.5 | $49.00 |
| Feb 2019 | 3.5 | $35.00 |
| Oct 2017 | 3.5 | $14.00 |
| May 2013 | 3.5 | $27.55 |
| Aug 2012 | 2.0 | $17.10 |
| May 2018 | 1.8 | $15.00 |
| Apr 2015 | 0.5 | $5.40 |