| Sold | Grade | Monthly Average |
| Feb 2023 | 7.5 | $15.91 |
| Sep 2021 | 6.0 | $9.00 |
| May 2015 | 6.0 | $5.70 |
| May 2012 | 6.0 | $6.50 |
| Nov 2013 | 5.0 | $4.80 |
| Mar 2022 | 4.0 | $6.00 |
| Aug 2019 | 4.0 | $6.50 |
| Aug 2013 | 4.0 | $3.80 |
| Sep 2011 | 3.5 | $3.30 |
| Dec 2013 | 3.0 | $2.80 |
| Nov 2011 | 2.5 | $2.50 |
| Jan 2021 | 2.0 | $3.00 |
| Nov 2019 | 2.0 | $3.00 |
| Jul 2018 | 2.0 | $3.00 |