| Sold | Grade | Monthly Average |
| Nov 2016 | 7.5 | $10.13 |
| Nov 2015 | 7.5 | $10.13 |
| Nov 2013 | 7.0 | $6.30 |
| May 2017 | 6.5 | $9.70 |
| Oct 2023 | 6.0 | $25.00 |
| Apr 2022 | 6.0 | $35.00 |
| Mar 2021 | 6.0 | $25.00 |
| Dec 2019 | 6.0 | $15.00 |
| Feb 2017 | 6.0 | $7.20 |
| Mar 2014 | 6.0 | $5.85 |
| Aug 2013 | 6.0 | $3.50 |
| Apr 2014 | 5.5 | $8.20 |