| Sold | Grade | Monthly Average |
| Aug 2013 | 8.5 | $10.75 |
| Oct 2012 | 8.0 | $8.55 |
| Nov 2010 | 6.0 | $6.00 |
| Jan 2024 | 5.5 | $4.30 |
| Aug 2023 | 5.0 | $3.80 |
| Sep 2021 | 4.5 | $3.49 |
| Nov 2017 | 4.5 | $4.40 |
| Nov 2025 | 4.0 | $4.20 |
| Oct 2020 | 4.0 | $4.40 |
| Oct 2020 | 3.5 | $3.49 |
| Jul 2012 | 3.5 | $2.90 |
| Aug 2023 | 3.0 | $2.50 |
| Apr 2016 | 3.0 | $2.20 |
| Oct 2015 | 2.5 | $1.90 |
| Nov 2021 | 2.0 | $2.00 |
| May 2020 | 2.0 | $2.20 |
| May 2017 | 2.0 | $1.70 |
| May 2014 | 1.5 | $1.10 |