| Sold | Grade | Monthly Average |
| Jul 2026 | 6.0 | $6.00 |
| Oct 2011 | 8.0 | $5.40 |
| Mar 2011 | 6.0 | $3.20 |
| May 2021 | 5.0 | $4.80 |
| Aug 2018 | 4.5 | $4.40 |
| Jul 2025 | 4.0 | $2.66 |
| Aug 2023 | 4.0 | $2.80 |
| Apr 2023 | 4.0 | $2.80 |
| Feb 2022 | 4.0 | $3.20 |
| Nov 2021 | 4.0 | $3.20 |
| Jan 2018 | 4.0 | $2.65 |
| Sep 2017 | 4.0 | $1.70 |
| Apr 2018 | 3.5 | $3.20 |
| May 2012 | 3.5 | $2.10 |
| Mar 2011 | 2.0 | $1.05 |
| Mar 2012 | 1.8 | $1.10 |