| Sold | Grade | Monthly Average |
| May 2011 | 6.0 | $63.00 |
| Dec 2023 | 5.5 | $47.00 |
| Dec 2016 | 4.5 | $16.00 |
| Oct 2022 | 3.5 | $14.50 |
| Feb 2024 | 3.0 | $15.50 |
| Jan 2023 | 3.0 | $12.00 |
| Feb 2024 | 2.0 | $14.50 |
| Mar 2017 | 2.0 | $13.00 |
| Jan 2012 | 2.0 | $26.50 |
| Feb 2024 | 1.8 | $12.00 |
| Jan 2023 | 1.8 | $10.10 |
| Mar 2017 | 1.8 | $10.35 |
| Aug 2020 | 0.5 | $4.40 |
| Oct 2014 | 0.5 | $3.80 |