| Sold | Grade | Monthly Average |
| Jun 2012 | 6.0 | $2.40 |
| Jan 2026 | 4.5 | $2.90 |
| Feb 2025 | 4.0 | $2.50 |
| Mar 2024 | 4.0 | $2.50 |
| Apr 2022 | 4.0 | $2.40 |
| Mar 2022 | 4.0 | $2.40 |
| Aug 2018 | 4.0 | $2.80 |
| Dec 2010 | 4.0 | $1.20 |
| Aug 2010 | 4.0 | $1.20 |
| Feb 2009 | 4.0 | $1.42 |
| Nov 2019 | 3.5 | $1.80 |
| Jun 2017 | 3.0 | $1.70 |
| May 2015 | 3.0 | $1.70 |
| Feb 2015 | 2.0 | $1.20 |
| Oct 2012 | 2.0 | $1.35 |