| Sold | Grade | Monthly Average |
| May 2015 | 5.0 | $16.20 |
| Apr 2021 | 4.5 | $13.00 |
| Apr 2020 | 4.5 | $13.00 |
| Aug 2019 | 3.5 | $5.70 |
| Sep 2016 | 3.5 | $3.60 |
| Apr 2016 | 3.5 | $2.80 |
| Feb 2014 | 3.5 | $10.10 |
| Dec 2019 | 3.0 | $3.30 |
| Oct 2020 | 2.5 | $2.80 |
| Sep 2020 | 2.5 | $2.80 |
| May 2021 | 2.0 | $2.40 |
| Mar 2021 | 2.0 | $2.40 |
| Sep 2017 | 2.0 | $2.57 |
| Jan 2012 | 2.0 | $6.70 |
| Jan 2020 | 1.5 | $2.00 |
| Sep 2022 | 1.0 | $3.00 |
| Jan 2014 | 0.5 | $1.90 |