| Sold | Grade | Monthly Average |
| Aug 2026 | 2.0 | $2.65 |
| Jul 2018 | 4.0 | $4.00 |
| May 2013 | 3.0 | $2.80 |
| Jan 2013 | 3.0 | $2.80 |
| Nov 2022 | 2.0 | $2.00 |
| Jan 2020 | 2.0 | $2.00 |
| Apr 2018 | 2.0 | $2.00 |
| Aug 2017 | 2.0 | $2.00 |
| Jun 2017 | 2.0 | $2.00 |
| Dec 2016 | 2.0 | $2.00 |
| Jul 2015 | 2.0 | $2.00 |
| Sep 2011 | 1.0 | $1.10 |