| Sold | Grade | Monthly Average |
| Aug 2025 | 1.0 | $12.75 |
| Jul 2011 | 5.0 | $15.50 |
| Feb 2018 | 4.5 | $14.25 |
| Dec 2022 | 4.0 | $36.00 |
| Jul 2013 | 4.0 | $39.60 |
| Dec 2009 | 4.0 | $18.00 |
| Mar 2020 | 3.0 | $33.00 |
| Feb 2020 | 2.5 | $29.00 |
| Jul 2021 | 2.0 | $18.00 |
| May 2021 | 2.0 | $18.00 |
| Jan 2020 | 2.0 | $23.00 |
| May 2012 | 1.5 | $12.50 |
| Oct 2020 | 1.0 | $9.00 |
| Mar 2021 | 0.5 | $4.49 |