| Sold | Grade | Monthly Average |
| Jul 2013 | 9.6 | $19.80 |
| Jan 2013 | 9.6 | $19.80 |
| Jul 2012 | 9.6 | $20.25 |
| Apr 2012 | 9.6 | $17.10 |
| Mar 2012 | 9.6 | $18.00 |
| Apr 2011 | 9.6 | $30.00 |
| Jul 2010 | 9.6 | $47.33 |
| Jul 2010 | 9.4 | $42.00 |
| Nov 2019 | 8.5 | $10.00 |
| Jul 2013 | 8.5 | $11.00 |
| Dec 2015 | 8.0 | $9.60 |
| Jun 2013 | 8.0 | $9.60 |
| May 2015 | 7.5 | $9.00 |
| Jul 2018 | 6.0 | $7.20 |
| Feb 2016 | 6.0 | $7.75 |