| Sold | Grade | Monthly Average |
| Jan 2024 | 3.5 | $15.50 |
| Feb 2014 | 4.5 | $9.90 |
| Mar 2021 | 4.0 | $19.50 |
| Aug 2013 | 4.0 | $9.00 |
| Jun 2013 | 3.0 | $5.32 |
| May 2018 | 2.5 | $8.20 |
| Oct 2015 | 2.5 | $7.20 |
| Aug 2021 | 2.0 | $9.80 |
| Jul 2021 | 2.0 | $9.80 |
| Mar 2013 | 2.0 | $4.40 |
| Dec 2010 | 2.0 | $4.00 |
| Jan 2022 | 1.5 | $7.30 |
| Dec 2019 | 1.5 | $7.30 |
| Jul 2011 | 1.0 | $2.00 |
| Oct 2015 | 0.5 | $1.60 |