| Sold | Grade | Monthly Average |
| Apr 2026 | 2.0 | $9.00 |
| Oct 2025 | 8.5 | $115.00 |
| May 2017 | 8.0 | $25.20 |
| May 2017 | 7.5 | $20.25 |
| Jan 2015 | 7.0 | $16.20 |
| May 2017 | 6.5 | $19.80 |
| Jan 2015 | 6.0 | $11.60 |
| Oct 2014 | 6.0 | $6.49 |
| Sep 2014 | 4.0 | $4.65 |
| Feb 2023 | 3.5 | $23.00 |
| Jul 2021 | 2.5 | $8.40 |
| Dec 2019 | 2.0 | $6.65 |