| Sold | Grade | Monthly Average |
| Sep 2025 | 2.5 | $15.75 |
| Oct 2025 | 1.5 | $8.60 |
| Sep 2015 | 4.0 | $12.95 |
| Nov 2018 | 3.5 | $9.30 |
| Jan 2014 | 3.0 | $11.05 |
| Aug 2017 | 2.5 | $6.60 |
| Jul 2022 | 2.0 | $6.30 |
| Jul 2021 | 2.0 | $6.30 |
| Oct 2020 | 2.0 | $5.99 |
| May 2013 | 2.0 | $4.49 |
| May 2017 | 1.8 | $4.40 |
| Apr 2015 | 1.8 | $5.30 |
| Dec 2013 | 1.5 | $5.60 |
| Mar 2022 | 1.0 | $3.70 |
| Oct 2012 | 1.0 | $2.40 |