| Sold | Grade | Monthly Average |
| Feb 2012 | 4.5 | $30.09 |
| Mar 2014 | 4.0 | $70.00 |
| Dec 2012 | 4.0 | $28.00 |
| Nov 2019 | 3.5 | $31.00 |
| May 2025 | 3.0 | $44.00 |
| Dec 2016 | 3.0 | $9.00 |
| May 2016 | 3.0 | $49.50 |
| Jan 2023 | 2.0 | $31.50 |
| Jul 2020 | 2.0 | $39.95 |
| Dec 2017 | 1.8 | $22.80 |
| Sep 2021 | 1.5 | $8.00 |
| Aug 2015 | 1.5 | $28.00 |
| Aug 2024 | 1.0 | $15.50 |
| Aug 2020 | 1.0 | $29.00 |
| Jul 2013 | 1.0 | $22.00 |
| Jun 2018 | 0.5 | $10.50 |