| Sold | Grade | Monthly Average |
| Jul 2013 | 9.0 | $16.05 |
| Nov 2012 | 8.0 | $11.10 |
| Mar 2019 | 6.0 | $6.30 |
| Oct 2016 | 6.0 | $5.40 |
| Apr 2019 | 5.5 | $5.25 |
| Jan 2014 | 5.5 | $4.80 |
| Jun 2024 | 4.0 | $2.50 |
| May 2024 | 4.0 | $2.50 |
| Jun 2022 | 4.0 | $2.40 |
| Apr 2021 | 4.0 | $3.00 |
| Apr 2018 | 4.0 | $3.60 |
| Nov 2021 | 3.5 | $2.00 |
| Jan 2017 | 3.5 | $2.85 |
| Aug 2024 | 3.0 | $2.70 |
| Aug 2024 | 2.5 | $2.50 |
| Jul 2015 | 2.0 | $1.49 |
| Nov 2012 | 2.0 | $1.80 |
| May 2012 | 2.0 | $1.80 |
| Jun 2010 | 2.0 | $2.40 |
| May 2010 | 2.0 | $2.40 |
| Jan 2010 | 1.0 | $1.42 |