| Sold | Grade | Monthly Average |
| Apr 2024 | 4.0 | $7.80 |
| Mar 2024 | 4.0 | $6.00 |
| Jul 2014 | 8.0 | $19.80 |
| Jan 2010 | 8.0 | $24.50 |
| Oct 2018 | 7.0 | $25.50 |
| Aug 2014 | 7.0 | $14.33 |
| Feb 2021 | 6.0 | $18.00 |
| Nov 2021 | 4.0 | $12.00 |
| Sep 2019 | 4.0 | $12.00 |
| Oct 2023 | 3.5 | $7.40 |
| Dec 2022 | 3.0 | $8.74 |
| May 2020 | 3.0 | $9.20 |
| Jun 2019 | 2.5 | $7.90 |
| Sep 2018 | 2.5 | $7.80 |
| Oct 2017 | 2.5 | $6.27 |
| Mar 2012 | 2.0 | $4.40 |
| Nov 2016 | 1.8 | $5.60 |
| Sep 2015 | 1.8 | $5.60 |
| Oct 2013 | 1.8 | $4.49 |
| Jul 2016 | 0.5 | $1.70 |
| Dec 2015 | 0.5 | $1.70 |