| Sold | Grade | Monthly Average |
| Feb 2015 | 9.4 | $6.50 |
| Aug 2011 | 9.4 | $4.00 |
| Apr 2010 | 8.0 | $1.60 |
| Feb 2010 | 8.0 | $0.98 |
| Dec 2009 | 8.0 | $1.60 |
| Jan 2017 | 6.0 | $3.00 |
| Aug 2015 | 6.0 | $3.24 |
| Mar 2015 | 6.0 | $3.90 |
| May 2013 | 6.0 | $2.40 |
| Sep 2012 | 6.0 | $1.40 |
| Dec 2022 | 4.0 | $3.20 |
| Aug 2018 | 4.0 | $2.40 |
| Jan 2018 | 4.0 | $2.85 |
| Oct 2015 | 4.0 | $2.40 |
| Jan 2018 | 2.0 | $1.70 |