| Sold | Grade | Monthly Average |
| Jun 2026 | 4.5 | $27.00 |
| Dec 2010 | 5.0 | $11.50 |
| Mar 2024 | 4.0 | $8.00 |
| Feb 2024 | 4.0 | $6.00 |
| Apr 2017 | 4.0 | $6.27 |
| Apr 2014 | 4.0 | $10.35 |
| Nov 2023 | 3.5 | $3.60 |
| Dec 2019 | 3.5 | $8.80 |
| May 2025 | 3.0 | $8.00 |
| Feb 2020 | 3.0 | $7.70 |
| Oct 2012 | 3.0 | $7.60 |
| May 2013 | 2.5 | $5.70 |
| Jan 2012 | 2.5 | $6.40 |
| Jun 2017 | 2.0 | $5.00 |
| Apr 2015 | 2.0 | $5.60 |
| Jul 2013 | 2.0 | $5.30 |
| Nov 2021 | 1.5 | $4.49 |
| Mar 2018 | 1.5 | $4.49 |
| Jan 2010 | 0.5 | $1.20 |