| Sold | Grade | Monthly Average |
| Sep 2026 | 4.0 | $4.00 |
| Jun 2012 | 7.0 | $8.40 |
| Jan 2020 | 6.0 | $6.00 |
| Sep 2024 | 4.5 | $4.40 |
| Jul 2025 | 3.0 | $3.00 |
| Feb 2026 | 2.5 | $2.65 |
| Oct 2018 | 2.5 | $2.40 |
| Sep 2016 | 2.5 | $2.40 |
| Apr 2016 | 2.5 | $2.40 |
| Apr 2022 | 2.0 | $2.00 |
| Feb 2017 | 2.0 | $2.00 |
| Apr 2015 | 1.8 | $1.80 |
| Feb 2014 | 1.0 | $1.10 |