| Sold | Grade | Monthly Average |
| Nov 2009 | 6.0 | $4.80 |
| Jun 2023 | 4.0 | $3.80 |
| Nov 2022 | 4.0 | $4.00 |
| Aug 2021 | 4.0 | $4.50 |
| Jul 2021 | 4.0 | $4.00 |
| Dec 2019 | 4.0 | $4.00 |
| Apr 2019 | 3.5 | $2.20 |
| Aug 2023 | 2.0 | $2.50 |
| Jul 2020 | 2.0 | $2.00 |
| Oct 2018 | 2.0 | $1.70 |
| Jan 2013 | 2.0 | $2.00 |
| Dec 2012 | 2.0 | $1.20 |
| Jan 2012 | 2.0 | $2.00 |
| Aug 2017 | 1.8 | $1.70 |
| Feb 2013 | 1.5 | $1.40 |