| Sold | Grade | Monthly Average |
| Jun 2013 | 9.4 | $39.99 |
| Oct 2012 | 8.0 | $34.48 |
| Mar 2020 | 7.0 | $41.00 |
| Aug 2015 | 6.5 | $22.50 |
| Mar 2015 | 6.5 | $37.55 |
| Nov 2015 | 6.0 | $24.00 |
| Sep 2017 | 4.0 | $15.20 |
| Aug 2017 | 4.0 | $16.00 |
| Aug 2015 | 4.0 | $16.00 |
| Mar 2020 | 3.5 | $28.00 |
| Jun 2019 | 3.0 | $11.40 |
| Jul 2016 | 2.5 | $10.00 |