| Sold | Grade | Monthly Average |
| Jan 2013 | 5.5 | $35.50 |
| Oct 2016 | 4.5 | $17.75 |
| May 2020 | 4.0 | $14.25 |
| Jan 2019 | 3.0 | $6.30 |
| Apr 2015 | 3.0 | $13.05 |
| May 2022 | 2.0 | $3.60 |
| Aug 2020 | 2.0 | $3.60 |
| May 2011 | 2.0 | $10.25 |
| Nov 2010 | 2.0 | $10.25 |
| Mar 2010 | 2.0 | $10.93 |
| Jul 2020 | 1.8 | $3.10 |
| Jun 2018 | 1.8 | $4.30 |
| Jan 2018 | 1.8 | $2.49 |
| Nov 2015 | 1.8 | $4.79 |
| Oct 2020 | 0.5 | $2.00 |