| Sold | Grade | Monthly Average |
| Apr 2026 | 4.0 | $15.00 |
| Apr 2011 | 4.0 | $13.00 |
| Dec 2018 | 3.5 | $9.12 |
| Jul 2023 | 3.0 | $6.70 |
| Aug 2014 | 2.5 | $8.55 |
| Feb 2026 | 2.0 | $3.60 |
| May 2021 | 2.0 | $4.80 |
| Jul 2012 | 1.8 | $7.60 |
| Sep 2016 | 1.5 | $5.80 |
| Nov 2022 | 1.0 | $2.40 |
| Apr 2019 | 1.0 | $3.60 |
| Apr 2018 | 1.0 | $3.60 |