| Sold | Grade | Monthly Average |
| Jan 2022 | 5.0 | $14.25 |
| Jul 2019 | 4.5 | $13.00 |
| Dec 2018 | 4.5 | $18.00 |
| Aug 2011 | 4.5 | $15.25 |
| Oct 2018 | 4.0 | $17.00 |
| Dec 2013 | 4.0 | $14.70 |
| Apr 2010 | 4.0 | $14.00 |
| Dec 2015 | 3.5 | $9.60 |
| Apr 2019 | 3.0 | $6.70 |
| May 2018 | 3.0 | $6.70 |
| Dec 2014 | 3.0 | $9.80 |
| Feb 2023 | 2.0 | $6.00 |
| Nov 2022 | 2.0 | $6.00 |
| Sep 2017 | 1.8 | $3.80 |
| Feb 2013 | 1.0 | $3.80 |