| Sold | Grade | Monthly Average |
| Feb 2015 | 6.0 | $18.00 |
| Mar 2011 | 6.0 | $15.00 |
| Jun 2018 | 4.0 | $17.50 |
| Jun 2020 | 3.5 | $7.20 |
| Oct 2019 | 2.5 | $5.13 |
| May 2015 | 2.5 | $5.40 |
| Feb 2023 | 2.0 | $3.30 |
| Sep 2022 | 2.0 | $3.30 |
| May 2020 | 2.0 | $4.49 |
| Jul 2018 | 2.0 | $5.60 |
| Sep 2016 | 1.8 | $4.00 |
| May 2017 | 1.5 | $3.49 |
| Jun 2012 | 1.0 | $2.90 |
| Jul 2016 | 0.5 | $1.35 |
| Feb 2015 | 0.5 | $1.20 |