| Sold | Grade | Monthly Average |
| Dec 2025 | 2.0 | $3.00 |
| Feb 2017 | 7.0 | $12.50 |
| Feb 2024 | 5.0 | $50.35 |
| Dec 2023 | 5.0 | $7.20 |
| Sep 2020 | 4.0 | $6.00 |
| Aug 2016 | 4.0 | $4.80 |
| May 2014 | 4.0 | $4.80 |
| Aug 2012 | 4.0 | $4.15 |
| May 2015 | 3.5 | $4.10 |
| Mar 2021 | 2.5 | $3.60 |
| Jan 2017 | 2.0 | $2.40 |
| Aug 2014 | 1.8 | $2.05 |
| Oct 2014 | 1.0 | $1.30 |