| Sold | Grade | Monthly Average |
| Oct 2020 | 8.0 | $9.75 |
| Jun 2016 | 8.0 | $9.00 |
| Jul 2013 | 6.5 | $7.20 |
| Dec 2020 | 5.5 | $6.00 |
| Dec 2025 | 4.0 | $4.00 |
| Apr 2023 | 4.0 | $2.88 |
| Apr 2018 | 4.0 | $3.80 |
| Apr 2014 | 4.0 | $3.80 |
| Sep 2012 | 4.0 | $3.60 |
| Apr 2025 | 3.0 | $2.50 |
| Dec 2016 | 3.0 | $2.20 |
| Dec 2016 | 2.5 | $1.90 |
| Nov 2015 | 2.5 | $1.90 |
| Apr 2022 | 2.0 | $2.00 |
| Jul 2013 | 1.8 | $1.20 |
| Apr 2013 | 1.0 | $1.20 |
| Mar 2022 | 0.3 | $2.00 |
| Mar 2016 | 0.3 | $1.35 |