| Sold | Grade | Monthly Average |
| Jan 2026 | 4.0 | $3.60 |
| Feb 2011 | 9.4 | $16.00 |
| Sep 2019 | 6.0 | $6.00 |
| Oct 2012 | 6.0 | $3.42 |
| Oct 2020 | 5.0 | $4.56 |
| Oct 2011 | 5.0 | $1.90 |
| Dec 2010 | 5.0 | $1.90 |
| Aug 2011 | 4.5 | $1.70 |
| May 2024 | 4.0 | $4.00 |
| Dec 2021 | 4.0 | $3.80 |
| Sep 2016 | 4.0 | $1.60 |
| Mar 2018 | 3.5 | $3.50 |
| May 2021 | 3.0 | $2.80 |
| Mar 2020 | 3.0 | $2.80 |
| Apr 2018 | 3.0 | $2.80 |
| Jun 2014 | 2.5 | $1.20 |
| May 2023 | 2.0 | $2.50 |
| Oct 2021 | 2.0 | $2.00 |
| Jun 2019 | 2.0 | $2.00 |
| Feb 2012 | 2.0 | $1.05 |
| Aug 2011 | 2.0 | $1.10 |