| Sold | Grade | Monthly Average |
| Jun 2026 | 7.5 | $5.20 |
| Aug 2025 | 6.0 | $3.60 |
| Apr 2023 | 6.0 | $3.24 |
| Sep 2012 | 6.0 | $2.40 |
| Feb 2024 | 4.5 | $2.60 |
| Apr 2022 | 4.0 | $2.40 |
| Mar 2022 | 4.0 | $2.40 |
| Jan 2020 | 4.0 | $2.80 |
| Dec 2016 | 4.0 | $2.00 |
| Oct 2024 | 3.0 | $2.70 |
| Dec 2023 | 3.0 | $3.00 |
| Jun 2012 | 2.0 | $1.10 |
| Sep 2011 | 2.0 | $1.10 |
| Jul 2011 | 2.0 | $1.10 |
| Dec 2010 | 2.0 | $1.10 |