| Sold | Grade | Monthly Average |
| Apr 2013 | 6.0 | $13.20 |
| May 2011 | 6.0 | $12.00 |
| Feb 2011 | 5.5 | $9.40 |
| Jul 2015 | 5.0 | $6.70 |
| Feb 2020 | 4.0 | $4.80 |
| Jan 2020 | 4.0 | $5.50 |
| Nov 2019 | 4.0 | $4.32 |
| Jan 2018 | 4.0 | $8.00 |
| Jun 2025 | 3.5 | $4.00 |
| Jun 2016 | 3.5 | $3.20 |
| Mar 2016 | 3.5 | $3.20 |
| Nov 2014 | 3.0 | $3.45 |
| Aug 2025 | 2.0 | $2.65 |
| Sep 2022 | 2.0 | $2.40 |
| Aug 2022 | 2.0 | $2.40 |
| May 2022 | 2.0 | $2.40 |
| Jun 2019 | 2.0 | $2.80 |
| Nov 2014 | 2.0 | $2.50 |
| Aug 2016 | 1.8 | $1.60 |
| Mar 2014 | 1.0 | $1.10 |