| Sold | Grade | Monthly Average |
| Oct 2011 | 9.4 | $8.00 |
| Jan 2011 | 9.4 | $8.00 |
| Oct 2016 | 9.2 | $29.00 |
| Mar 2015 | 8.5 | $10.00 |
| Dec 2015 | 8.0 | $16.95 |
| Jul 2015 | 8.0 | $9.60 |
| Jun 2013 | 8.0 | $6.40 |
| Sep 2018 | 7.5 | $9.00 |
| Jan 2011 | 7.5 | $6.00 |
| Oct 2018 | 6.5 | $7.80 |
| Dec 2013 | 6.5 | $7.80 |
| Mar 2016 | 6.0 | $7.20 |
| Jan 2016 | 6.0 | $8.50 |
| Feb 2012 | 6.0 | $4.80 |