| Sold | Grade | Monthly Average |
| May 2019 | 9.2 | $22.50 |
| Sep 2010 | 9.2 | $36.00 |
| Apr 2019 | 8.0 | $21.00 |
| Aug 2017 | 8.0 | $17.20 |
| May 2010 | 7.0 | $25.50 |
| Apr 2015 | 6.5 | $17.00 |
| May 2018 | 6.0 | $15.75 |
| Aug 2014 | 6.0 | $14.18 |
| Sep 2013 | 6.0 | $10.45 |
| Mar 2011 | 6.0 | $10.00 |
| Aug 2024 | 5.5 | $96.00 |
| Feb 2020 | 4.0 | $10.25 |
| Oct 2017 | 4.0 | $8.55 |
| Jun 2017 | 4.0 | $9.00 |
| Dec 2015 | 4.0 | $12.30 |
| Jun 2015 | 4.0 | $7.35 |
| Jan 2015 | 4.0 | $4.10 |
| Feb 2014 | 4.0 | $12.15 |
| May 2019 | 3.0 | $8.40 |
| Mar 2019 | 3.0 | $8.40 |
| Oct 2018 | 2.0 | $5.60 |