| Sold | Grade | Monthly Average |
| Aug 2013 | 7.0 | $6.15 |
| Nov 2012 | 6.0 | $4.00 |
| Dec 2011 | 6.0 | $4.00 |
| Jun 2018 | 5.0 | $4.80 |
| Jul 2011 | 5.0 | $3.60 |
| Jan 2024 | 4.0 | $4.00 |
| Apr 2019 | 4.0 | $4.40 |
| May 2018 | 4.0 | $4.00 |
| Dec 2010 | 4.0 | $3.00 |
| Jan 2020 | 2.5 | $2.60 |
| Dec 2018 | 2.0 | $2.20 |
| Jan 2018 | 2.0 | $2.20 |
| Sep 2013 | 2.0 | $1.20 |
| Aug 2012 | 1.0 | $1.10 |