| Sold | Grade | Monthly Average |
| Aug 2018 | 8.0 | $8.00 |
| Mar 2014 | 8.0 | $5.20 |
| Aug 2011 | 8.0 | $4.80 |
| Jun 2020 | 6.0 | $6.50 |
| Feb 2020 | 6.0 | $6.00 |
| Nov 2019 | 6.0 | $6.50 |
| Feb 2012 | 6.0 | $3.60 |
| Jul 2020 | 5.5 | $5.49 |
| Mar 2019 | 5.5 | $6.00 |
| Aug 2020 | 5.0 | $5.00 |
| Sep 2017 | 4.0 | $4.00 |
| Jan 2017 | 4.0 | $4.00 |
| Mar 2015 | 4.0 | $4.00 |
| Jan 2015 | 4.0 | $4.00 |
| Sep 2010 | 4.0 | $2.40 |