| Sold | Grade | Monthly Average |
| May 2012 | 5.0 | $32.60 |
| May 2019 | 4.5 | $29.00 |
| Mar 2017 | 4.5 | $18.00 |
| Mar 2021 | 4.0 | $26.00 |
| Aug 2018 | 4.0 | $31.00 |
| Sep 2017 | 3.5 | $19.00 |
| Oct 2015 | 3.5 | $19.00 |
| Sep 2018 | 2.5 | $20.00 |
| Dec 2014 | 2.5 | $14.05 |
| Aug 2018 | 2.0 | $17.50 |
| Feb 2020 | 1.8 | $20.00 |
| Apr 2023 | 1.5 | $10.00 |
| Dec 2019 | 1.5 | $14.50 |
| Feb 2018 | 1.5 | $9.60 |