| Sold | Grade | Monthly Average |
| Jul 2025 | 4.0 | $15.00 |
| Feb 2011 | 6.0 | $10.75 |
| Oct 2014 | 5.0 | $8.60 |
| Sep 2012 | 4.5 | $7.90 |
| Apr 2019 | 4.0 | $7.75 |
| Oct 2017 | 4.0 | $3.87 |
| Oct 2016 | 4.0 | $7.20 |
| Mar 2016 | 3.5 | $5.89 |
| May 2014 | 3.5 | $6.70 |
| Sep 2018 | 3.0 | $5.40 |
| Sep 2020 | 2.0 | $3.90 |
| Dec 2019 | 2.0 | $3.90 |
| Aug 2010 | 2.0 | $3.90 |