| Sold | Grade | Monthly Average |
| Oct 2025 | 2.0 | $5.00 |
| Mar 2019 | 6.0 | $9.00 |
| Apr 2010 | 4.5 | $3.79 |
| Sep 2021 | 4.0 | $4.80 |
| Jan 2019 | 4.0 | $6.00 |
| Jul 2015 | 4.0 | $6.80 |
| Jan 2014 | 4.0 | $3.60 |
| Nov 2016 | 3.0 | $3.70 |
| Feb 2012 | 3.0 | $2.49 |
| Jan 2024 | 2.0 | $2.38 |
| Feb 2023 | 2.0 | $2.50 |
| Aug 2021 | 2.0 | $2.40 |
| Jul 2020 | 2.0 | $3.00 |
| Jan 2020 | 2.0 | $3.00 |
| Jun 2019 | 2.0 | $3.00 |
| Feb 2018 | 2.0 | $2.85 |
| Mar 2010 | 2.0 | $1.60 |
| Dec 2008 | 2.0 | $1.60 |
| Feb 2008 | 2.0 | $2.85 |
| Dec 2020 | 1.8 | $2.16 |
| Mar 2017 | 1.8 | $2.40 |
| May 2010 | 1.8 | $1.49 |