| Sold | Grade | Monthly Average |
| Apr 2026 | 3.5 | $8.00 |
| Jun 2026 | 1.8 | $2.65 |
| May 2017 | 6.0 | $4.56 |
| Mar 2013 | 6.0 | $6.00 |
| Mar 2016 | 4.5 | $3.59 |
| Feb 2026 | 4.0 | $4.00 |
| Sep 2024 | 4.0 | $4.00 |
| Jan 2024 | 4.0 | $3.80 |
| Sep 2015 | 4.0 | $1.28 |
| Jan 2020 | 3.0 | $2.80 |
| Dec 2018 | 3.0 | $2.80 |
| Oct 2016 | 3.0 | $1.60 |
| Nov 2015 | 2.5 | $1.35 |
| May 2010 | 2.5 | $1.60 |
| May 2025 | 2.0 | $2.50 |
| Sep 2019 | 2.0 | $2.00 |
| May 2018 | 1.5 | $1.70 |