| Sold | Grade | Monthly Average |
| Aug 2025 | 4.0 | $4.00 |
| Jan 2018 | 6.5 | $5.76 |
| Aug 2016 | 5.5 | $5.40 |
| Oct 2011 | 5.5 | $5.40 |
| Jul 2012 | 5.0 | $5.50 |
| Apr 2024 | 4.0 | $4.00 |
| May 2022 | 4.0 | $4.70 |
| Aug 2024 | 3.0 | $3.00 |
| Jan 2013 | 3.0 | $3.00 |
| Jun 2024 | 2.5 | $7.00 |
| Dec 2022 | 2.0 | $2.20 |
| Sep 2019 | 2.0 | $2.20 |
| Sep 2010 | 2.0 | $2.20 |
| Jun 2021 | 1.8 | $2.00 |