| Sold | Grade | Monthly Average |
| Jun 2011 | 4.0 | $72.00 |
| Nov 2019 | 3.5 | $55.80 |
| Oct 2019 | 3.5 | $62.00 |
| Mar 2013 | 3.0 | $50.00 |
| Sep 2020 | 2.5 | $47.00 |
| Jan 2023 | 2.0 | $39.00 |
| Apr 2016 | 2.0 | $33.00 |
| Mar 2015 | 2.0 | $45.00 |
| May 2011 | 2.0 | $45.00 |
| Aug 2021 | 1.8 | $28.00 |
| Jun 2018 | 1.8 | $27.50 |
| Jun 2022 | 1.5 | $16.50 |
| Feb 2016 | 1.5 | $23.50 |
| Mar 2013 | 1.5 | $32.00 |
| Feb 2019 | 1.0 | $19.25 |
| Dec 2011 | 1.0 | $23.00 |
| Oct 2019 | 0.5 | $10.50 |