| Sold | Grade | Monthly Average |
| Nov 2020 | 9.4 | $68.00 |
| Nov 2019 | 9.4 | $62.99 |
| Apr 2019 | 9.4 | $55.99 |
| Aug 2017 | 9.4 | $69.00 |
| Jun 2017 | 9.4 | $69.00 |
| Dec 2016 | 9.4 | $68.00 |
| Jul 2016 | 9.4 | $54.95 |
| Nov 2015 | 9.4 | $54.95 |
| Aug 2015 | 9.4 | $54.95 |
| Nov 2014 | 9.4 | $61.00 |
| Apr 2014 | 9.4 | $49.46 |
| Jul 2013 | 9.4 | $49.46 |
| May 2013 | 9.4 | $54.95 |
| Feb 2014 | 9.0 | $17.00 |
| Jul 2023 | 6.5 | $51.00 |
| Jan 2018 | 6.0 | $34.00 |