| Sold | Grade | Monthly Average |
| Apr 2021 | 4.0 | $22.00 |
| Feb 2015 | 3.5 | $11.50 |
| Jan 2013 | 3.5 | $9.60 |
| Jul 2022 | 3.0 | $11.50 |
| Mar 2021 | 2.5 | $14.00 |
| Nov 2011 | 2.5 | $8.49 |
| Dec 2009 | 2.0 | $8.60 |
| May 2018 | 1.8 | $5.99 |
| Jun 2013 | 1.8 | $5.30 |
| Jan 2020 | 1.5 | $2.90 |
| Dec 2017 | 1.5 | $5.20 |
| Feb 2014 | 1.5 | $4.55 |
| Nov 2014 | 1.0 | $3.90 |