| Sold | Grade | Monthly Average |
| Dec 2014 | 9.4 | $1.30 |
| Jul 2014 | 9.4 | $3.30 |
| Jan 2014 | 9.4 | $4.70 |
| Nov 2013 | 9.4 | $4.35 |
| Jul 2013 | 9.4 | $4.00 |
| Dec 2012 | 9.4 | $3.99 |
| Dec 2021 | 8.0 | $3.20 |
| Jan 2020 | 8.0 | $3.20 |
| Jul 2017 | 8.0 | $2.60 |
| Sep 2016 | 8.0 | $2.40 |
| Feb 2016 | 8.0 | $3.80 |
| Nov 2015 | 8.0 | $3.40 |
| Mar 2015 | 8.0 | $1.10 |
| Feb 2015 | 8.0 | $1.10 |
| Dec 2013 | 8.0 | $3.40 |
| Oct 2013 | 8.0 | $2.99 |
| Feb 2013 | 8.0 | $3.20 |
| Aug 2018 | 6.0 | $2.40 |