| Sold | Grade | Monthly Average |
| Feb 2012 | 9.0 | $17.00 |
| May 2010 | 9.0 | $52.00 |
| Nov 2012 | 8.5 | $41.55 |
| Oct 2011 | 7.5 | $11.00 |
| Jun 2018 | 6.0 | $13.00 |
| Jan 2024 | 5.5 | $11.75 |
| Dec 2023 | 4.0 | $10.00 |
| Aug 2021 | 4.0 | $8.80 |
| Nov 2022 | 3.0 | $9.30 |
| Oct 2022 | 3.0 | $7.13 |
| May 2020 | 3.0 | $6.10 |
| Jan 2015 | 2.5 | $5.60 |
| Jan 2024 | 2.0 | $8.55 |
| Apr 2018 | 2.0 | $4.40 |
| Nov 2018 | 1.8 | $3.89 |