| Sold | Grade | Monthly Average |
| Dec 2023 | 2.0 | $17.00 |
| Oct 2011 | 5.0 | $26.50 |
| Oct 2019 | 3.5 | $18.00 |
| Jul 2022 | 3.0 | $39.00 |
| May 2018 | 3.0 | $26.50 |
| Dec 2015 | 3.0 | $25.50 |
| Feb 2020 | 2.5 | $20.00 |
| Mar 2012 | 2.0 | $12.00 |
| Jan 2021 | 1.8 | $15.00 |
| Sep 2017 | 1.5 | $11.97 |
| Aug 2012 | 1.5 | $11.60 |
| Jan 2023 | 0.5 | $4.70 |