| Sold | Grade | Monthly Average |
| May 2017 | 9.4 | $8.00 |
| Sep 2013 | 9.4 | $7.00 |
| Apr 2010 | 9.4 | $1.10 |
| Mar 2010 | 9.4 | $1.30 |
| Feb 2010 | 9.4 | $1.30 |
| Jul 2009 | 9.4 | $4.90 |
| Apr 2008 | 9.4 | $5.60 |
| Jan 2008 | 9.4 | $5.60 |
| Mar 2007 | 9.4 | $5.60 |
| Jan 2021 | 9.2 | $13.00 |
| Nov 2016 | 8.0 | $5.20 |
| Apr 2010 | 8.0 | $1.10 |