| Sold | Grade | Monthly Average |
| May 2012 | 6.0 | $61.00 |
| Aug 2022 | 5.5 | $115.00 |
| Jan 2022 | 5.0 | $145.00 |
| Aug 2013 | 5.0 | $48.00 |
| Jul 2023 | 4.5 | $37.00 |
| Nov 2019 | 4.5 | $46.00 |
| Apr 2010 | 4.5 | $37.50 |
| Jul 2023 | 4.0 | $65.00 |
| Oct 2014 | 4.0 | $26.00 |
| Nov 2019 | 2.0 | $14.40 |
| Sep 2018 | 2.0 | $21.00 |
| Aug 2010 | 2.0 | $17.00 |
| May 2020 | 1.5 | $11.00 |
| Apr 2016 | 1.0 | $10.25 |
| Jun 2020 | 0.5 | $4.00 |
| Oct 2015 | 0.5 | $5.20 |