| Sold | Grade | Monthly Average |
| Dec 2019 | 5.0 | $9.60 |
| Sep 2022 | 4.5 | $8.80 |
| May 2023 | 4.0 | $8.00 |
| Dec 2022 | 4.0 | $8.00 |
| Aug 2019 | 4.0 | $7.60 |
| Sep 2016 | 4.0 | $8.80 |
| Feb 2011 | 4.0 | $6.60 |
| Nov 2009 | 4.0 | $6.84 |
| May 2012 | 3.5 | $5.70 |
| Mar 2020 | 3.0 | $5.32 |
| Oct 2017 | 3.0 | $6.70 |
| Jul 2017 | 3.0 | $6.70 |
| Sep 2018 | 2.5 | $5.70 |
| Dec 2015 | 2.0 | $4.80 |
| Dec 2010 | 2.0 | $3.60 |
| Jul 2022 | 1.8 | $3.20 |
| Dec 2010 | 1.0 | $1.99 |