| Sold | Grade | Monthly Average |
| May 2021 | 5.0 | $14.25 |
| Aug 2025 | 4.0 | $11.00 |
| Aug 2023 | 4.0 | $8.00 |
| Oct 2022 | 4.0 | $10.00 |
| Jun 2018 | 4.0 | $10.00 |
| Feb 2017 | 4.0 | $10.00 |
| Jan 2016 | 4.0 | $11.00 |
| Aug 2013 | 4.0 | $12.00 |
| Mar 2012 | 4.0 | $13.40 |
| Feb 2025 | 3.5 | $8.00 |
| Feb 2015 | 2.5 | $7.20 |
| Jul 2010 | 2.5 | $8.40 |
| Dec 2025 | 2.0 | $3.00 |
| Jul 2022 | 2.0 | $5.00 |
| Oct 2017 | 2.0 | $5.00 |
| Mar 2011 | 2.0 | $7.00 |
| Mar 2014 | 1.8 | $6.80 |
| Sep 2015 | 1.5 | $4.20 |
| Jan 2022 | 1.0 | $2.57 |
| Jan 2013 | 1.0 | $2.75 |