| Sold | Grade | Monthly Average |
| Dec 2012 | 6.0 | $13.00 |
| May 2012 | 5.0 | $10.50 |
| Oct 2023 | 4.5 | $22.00 |
| Jul 2020 | 4.5 | $10.50 |
| Dec 2019 | 4.0 | $8.80 |
| Jun 2017 | 4.0 | $8.80 |
| Dec 2012 | 3.5 | $7.60 |
| Aug 2025 | 3.0 | $15.50 |
| Aug 2016 | 3.0 | $6.70 |
| Nov 2010 | 3.0 | $6.70 |
| Apr 2024 | 2.5 | $6.70 |
| Aug 2023 | 2.0 | $4.80 |
| May 2022 | 2.0 | $4.80 |
| Aug 2017 | 2.0 | $4.56 |