| Sold | Grade | Monthly Average |
| Jun 2012 | 9.4 | $4.70 |
| Sep 2011 | 9.4 | $5.00 |
| Jun 2011 | 9.4 | $3.30 |
| Mar 2011 | 9.4 | $3.30 |
| Jan 2011 | 9.4 | $3.30 |
| Jul 2010 | 9.4 | $4.30 |
| Jun 2008 | 9.4 | $6.40 |
| May 2008 | 9.4 | $6.40 |
| Sep 2007 | 9.4 | $6.40 |
| Aug 2007 | 9.4 | $6.40 |
| Jul 2007 | 9.4 | $6.40 |
| Oct 2006 | 9.4 | $6.40 |
| Jun 2004 | 9.4 | $15.00 |
| Jun 2020 | 8.0 | $2.00 |
| May 2015 | 8.0 | $1.22 |
| Jan 2012 | 8.0 | $4.30 |
| Jul 2011 | 8.0 | $3.20 |
| Jan 2020 | 6.0 | $2.00 |
| Sep 2019 | 6.0 | $1.70 |
| Jul 2019 | 6.0 | $1.53 |
| Oct 2015 | 6.0 | $1.26 |