| Sold | Grade | Monthly Average |
| Jan 2021 | 5.5 | $57.00 |
| May 2016 | 5.5 | $32.25 |
| Dec 2025 | 4.5 | $47.00 |
| Oct 2016 | 4.5 | $43.00 |
| Jan 2025 | 4.0 | $59.85 |
| Feb 2010 | 4.0 | $53.20 |
| Mar 2021 | 3.5 | $50.00 |
| Sep 2021 | 3.0 | $40.00 |
| Feb 2015 | 3.0 | $27.50 |
| Jun 2023 | 2.5 | $45.00 |
| Dec 2022 | 2.0 | $32.00 |
| Mar 2018 | 2.0 | $20.50 |
| Jun 2012 | 2.0 | $18.00 |
| Jul 2018 | 1.8 | $24.23 |
| Dec 2022 | 1.5 | $9.80 |
| Jun 2017 | 0.5 | $3.70 |