| Sold | Grade | Monthly Average |
| Sep 2020 | 9.4 | $53.96 |
| Nov 2019 | 9.4 | $31.96 |
| Oct 2019 | 9.4 | $39.95 |
| Sep 2019 | 9.4 | $39.95 |
| Dec 2015 | 9.4 | $35.96 |
| Aug 2015 | 9.4 | $39.95 |
| Oct 2014 | 9.4 | $45.25 |
| Oct 2013 | 9.4 | $35.95 |
| May 2012 | 9.4 | $35.00 |
| Oct 2010 | 9.4 | $25.50 |
| Jun 2010 | 9.4 | $22.95 |
| Sep 2022 | 8.0 | $43.20 |
| Apr 2020 | 8.0 | $32.00 |
| Aug 2017 | 8.0 | $32.00 |