| Sold | Grade | Monthly Average |
| May 2010 | 9.4 | $12.00 |
| Feb 2010 | 9.4 | $12.00 |
| Oct 2009 | 9.4 | $12.00 |
| Sep 2009 | 9.4 | $10.75 |
| Jul 2009 | 9.4 | $10.75 |
| Mar 2009 | 9.4 | $10.75 |
| Dec 2008 | 9.4 | $10.80 |
| Feb 2017 | 9.0 | $7.20 |
| Oct 2015 | 9.0 | $13.50 |
| May 2017 | 8.0 | $6.40 |
| Sep 2011 | 7.0 | $8.40 |
| Jul 2023 | 6.0 | $6.00 |
| Aug 2018 | 6.0 | $4.80 |