| Sold | Grade | Monthly Average |
| May 2026 | 4.0 | $3.80 |
| Apr 2026 | 4.0 | $3.60 |
| Oct 2019 | 5.0 | $5.70 |
| Nov 2024 | 4.0 | $3.80 |
| Jun 2020 | 4.0 | $4.80 |
| Sep 2013 | 4.0 | $3.60 |
| Jan 2012 | 3.5 | $4.80 |
| May 2025 | 3.0 | $2.50 |
| May 2019 | 3.0 | $2.70 |
| May 2018 | 3.0 | $2.49 |
| Jan 2012 | 3.0 | $4.20 |
| Aug 2017 | 2.5 | $1.70 |
| Jul 2016 | 2.5 | $2.80 |
| Jun 2014 | 2.5 | $3.60 |
| Apr 2011 | 2.5 | $3.60 |
| Sep 2023 | 2.0 | $2.50 |
| Mar 2020 | 2.0 | $2.00 |
| Feb 2018 | 2.0 | $1.80 |
| Aug 2016 | 2.0 | $2.40 |
| Jun 2013 | 1.0 | $1.10 |