| Sold | Grade | Monthly Average |
| May 2026 | 3.5 | $32.00 |
| May 2026 | 2.0 | $17.00 |
| Oct 2020 | 8.0 | $51.00 |
| Sep 2011 | 8.0 | $46.00 |
| Oct 2025 | 7.0 | $67.00 |
| Jun 2014 | 7.0 | $38.75 |
| May 2020 | 6.5 | $73.00 |
| Sep 2012 | 6.0 | $19.08 |
| Dec 2020 | 5.5 | $31.00 |
| Dec 2011 | 5.5 | $37.00 |
| Aug 2023 | 4.5 | $110.00 |
| Mar 2024 | 4.0 | $62.00 |
| Sep 2022 | 4.0 | $115.00 |
| Jun 2015 | 4.0 | $48.00 |
| Aug 2011 | 4.0 | $38.00 |
| Aug 2018 | 2.0 | $34.00 |