| Sold | Grade | Monthly Average |
| Aug 2020 | 9.4 | $34.95 |
| Oct 2013 | 9.4 | $40.25 |
| Oct 2012 | 9.4 | $35.00 |
| Mar 2012 | 9.4 | $22.50 |
| Jan 2012 | 9.4 | $25.00 |
| Jul 2011 | 9.4 | $25.00 |
| Jun 2011 | 9.4 | $25.00 |
| Mar 2010 | 9.4 | $27.99 |
| Jun 2019 | 8.0 | $34.00 |
| Nov 2012 | 8.0 | $33.45 |
| Oct 2020 | 6.0 | $21.00 |
| Nov 2019 | 6.0 | $16.80 |