| Sold | Grade | Monthly Average |
| Mar 2010 | 8.0 | $9.00 |
| Jan 2015 | 6.5 | $8.20 |
| Oct 2014 | 6.0 | $6.40 |
| Sep 2017 | 5.5 | $4.86 |
| Jun 2025 | 4.5 | $4.18 |
| Jul 2020 | 4.0 | $4.00 |
| Jan 2024 | 2.0 | $9.03 |
| Dec 2022 | 2.0 | $2.00 |
| May 2021 | 2.0 | $1.90 |
| May 2018 | 2.0 | $2.00 |
| Sep 2016 | 2.0 | $2.00 |
| Mar 2010 | 1.0 | $1.49 |