| Sold | Grade | Monthly Average |
| Dec 2011 | 9.6 | $6.00 |
| Jan 2013 | 9.4 | $4.00 |
| Dec 2012 | 9.4 | $4.40 |
| Aug 2012 | 9.4 | $4.00 |
| Jun 2012 | 9.4 | $4.60 |
| Mar 2012 | 9.4 | $4.33 |
| Feb 2012 | 9.4 | $4.00 |
| Dec 2011 | 9.4 | $4.80 |
| Nov 2011 | 9.4 | $4.80 |
| Mar 2020 | 8.0 | $8.00 |
| Jul 2013 | 8.0 | $4.00 |
| Jan 2013 | 8.0 | $3.20 |
| Jun 2012 | 8.0 | $3.20 |
| Dec 2018 | 5.0 | $2.49 |