| Sold | Grade | Monthly Average |
| Nov 2019 | 4.5 | $4.40 |
| May 2018 | 4.0 | $4.00 |
| Apr 2018 | 4.0 | $4.00 |
| Sep 2012 | 4.0 | $4.00 |
| Apr 2019 | 3.5 | $3.20 |
| Aug 2018 | 3.5 | $3.20 |
| Mar 2020 | 3.0 | $2.80 |
| Nov 2016 | 3.0 | $2.80 |
| Aug 2017 | 2.5 | $2.40 |
| May 2017 | 2.5 | $1.70 |
| Nov 2020 | 2.0 | $2.00 |
| Nov 2018 | 2.0 | $2.00 |
| Jul 2017 | 2.0 | $2.00 |