| Sold | Grade | Monthly Average |
| Oct 2017 | 6.5 | $6.48 |
| Nov 2016 | 6.5 | $7.20 |
| Jan 2026 | 6.0 | $8.00 |
| Nov 2012 | 6.0 | $6.00 |
| Mar 2021 | 5.0 | $4.80 |
| Sep 2017 | 5.0 | $5.75 |
| Jul 2024 | 4.0 | $4.00 |
| Feb 2019 | 4.0 | $4.40 |
| Jul 2024 | 3.5 | $3.20 |
| Sep 2019 | 3.0 | $2.80 |
| Aug 2014 | 3.0 | $3.00 |
| Feb 2021 | 2.0 | $2.00 |
| Sep 2019 | 2.0 | $2.00 |
| Mar 2018 | 2.0 | $1.90 |
| Nov 2011 | 2.0 | $2.20 |
| Feb 2017 | 1.0 | $1.70 |
| Apr 2014 | 0.5 | $1.10 |