| Sold | Grade | Monthly Average |
| Jun 2025 | 8.0 | $40.00 |
| Apr 2013 | 7.0 | $12.50 |
| Oct 2023 | 5.5 | $8.10 |
| Oct 2023 | 5.0 | $7.20 |
| Sep 2016 | 4.5 | $11.00 |
| Dec 2022 | 4.0 | $6.00 |
| Nov 2019 | 4.0 | $6.00 |
| Dec 2024 | 3.5 | $3.42 |
| Aug 2020 | 3.0 | $3.60 |
| May 2015 | 3.0 | $5.70 |
| Jun 2025 | 2.5 | $3.60 |
| Aug 2020 | 2.5 | $2.80 |
| Nov 2013 | 2.5 | $3.79 |
| Sep 2011 | 2.5 | $3.99 |
| May 2020 | 2.0 | $2.40 |
| Jan 2012 | 2.0 | $3.30 |
| Jan 2010 | 2.0 | $1.80 |
| Aug 2017 | 1.8 | $2.52 |
| Sep 2021 | 1.5 | $2.00 |
| Feb 2012 | 0.5 | $1.10 |