| Sold | Grade | Monthly Average |
| Mar 2019 | 4.5 | $116.00 |
| Jan 2010 | 4.0 | $116.00 |
| Feb 2020 | 3.5 | $100.00 |
| Jul 2018 | 3.5 | $65.00 |
| May 2021 | 2.5 | $102.00 |
| Dec 2019 | 2.0 | $35.00 |
| Nov 2014 | 1.8 | $52.00 |
| Apr 2013 | 1.8 | $26.59 |
| Jul 2019 | 1.5 | $19.00 |
| Apr 2016 | 1.0 | $34.50 |
| Jan 2016 | 1.0 | $38.00 |
| Nov 2019 | 0.5 | $15.30 |
| Oct 2020 | 0.3 | $14.00 |