| Sold | Grade | Monthly Average |
| Oct 2011 | 8.0 | $19.00 |
| Aug 2017 | 7.0 | $15.00 |
| Apr 2017 | 6.5 | $19.50 |
| Mar 2011 | 5.5 | $9.70 |
| Nov 2025 | 3.5 | $6.20 |
| Jun 2016 | 3.0 | $5.40 |
| Jan 2010 | 3.0 | $6.63 |
| Nov 2017 | 2.5 | $4.60 |
| Oct 2012 | 2.5 | $4.60 |
| Nov 2011 | 2.0 | $3.90 |
| Jan 2012 | 1.5 | $2.90 |
| Dec 2011 | 0.5 | $1.10 |