| Sold | Grade | Monthly Average |
| Sep 2014 | 9.2 | $38.66 |
| Sep 2015 | 8.5 | $11.00 |
| May 2017 | 8.0 | $12.00 |
| Apr 2019 | 7.5 | $9.00 |
| Oct 2016 | 7.0 | $10.50 |
| Jan 2015 | 7.0 | $10.50 |
| Feb 2020 | 6.5 | $1.80 |
| Dec 2022 | 6.0 | $2.00 |
| Sep 2020 | 6.0 | $2.00 |
| Sep 2016 | 6.0 | $8.55 |
| Sep 2020 | 5.5 | $2.00 |
| Dec 2020 | 4.0 | $2.00 |
| Jun 2016 | 2.5 | $3.70 |