| Sold | Grade | Monthly Average |
| May 2011 | 7.5 | $12.25 |
| Aug 2017 | 5.5 | $11.75 |
| Apr 2025 | 4.0 | $10.25 |
| Feb 2023 | 4.0 | $20.00 |
| Jul 2019 | 4.0 | $8.80 |
| Dec 2010 | 4.0 | $6.60 |
| Aug 2023 | 3.5 | $8.99 |
| Oct 2012 | 3.5 | $5.70 |
| Jan 2018 | 3.0 | $6.70 |
| Mar 2020 | 2.5 | $5.42 |
| Apr 2022 | 2.0 | $4.80 |
| Dec 2016 | 2.0 | $4.80 |
| Apr 2016 | 2.0 | $4.56 |
| Feb 2016 | 2.0 | $5.25 |
| Feb 2014 | 2.0 | $3.90 |
| Jul 2024 | 1.0 | $3.20 |