| Sold | Grade | Monthly Average |
| Nov 2015 | 9.4 | $11.99 |
| Jun 2014 | 9.4 | $9.99 |
| May 2014 | 9.4 | $9.99 |
| Jun 2016 | 9.2 | $9.99 |
| Sep 2014 | 9.2 | $9.99 |
| Apr 2017 | 9.0 | $8.99 |
| Sep 2016 | 9.0 | $8.99 |
| Jun 2016 | 9.0 | $8.99 |
| Jun 2015 | 9.0 | $8.99 |
| Apr 2015 | 8.5 | $8.49 |
| Feb 2016 | 8.0 | $7.99 |
| Mar 2017 | 7.5 | $7.49 |
| Sep 2014 | 7.0 | $4.20 |
| Jul 2014 | 7.0 | $4.55 |
| Dec 2023 | 6.0 | $5.99 |
| Oct 2014 | 5.5 | $5.49 |