| Sold | Grade | Monthly Average |
| Sep 2015 | 6.0 | $7.10 |
| Jan 2008 | 6.0 | $6.00 |
| Jun 2025 | 5.0 | $11.00 |
| Jan 2024 | 5.0 | $4.80 |
| Jan 2019 | 4.5 | $4.40 |
| Jul 2017 | 4.5 | $3.96 |
| Jan 2025 | 4.0 | $5.40 |
| Apr 2020 | 4.0 | $4.40 |
| Oct 2016 | 4.0 | $2.85 |
| Jul 2010 | 3.5 | $1.60 |
| May 2025 | 3.0 | $5.00 |
| Mar 2021 | 2.5 | $2.40 |
| Mar 2021 | 2.0 | $2.00 |