| Sold | Grade | Monthly Average |
| Jun 2026 | 6.0 | $6.00 |
| May 2010 | 9.4 | $1.10 |
| Mar 2008 | 9.4 | $2.40 |
| Mar 2004 | 9.4 | $1.60 |
| May 2025 | 8.0 | $7.60 |
| Dec 2023 | 8.0 | $4.00 |
| Nov 2020 | 8.0 | $2.40 |
| Oct 2013 | 8.0 | $1.70 |
| Mar 2024 | 6.0 | $3.00 |
| Nov 2020 | 6.0 | $2.00 |
| Apr 2018 | 6.0 | $1.80 |
| Jul 2017 | 6.0 | $2.80 |
| Mar 2017 | 6.0 | $2.60 |
| Aug 2016 | 6.0 | $1.80 |
| Aug 2013 | 6.0 | $1.45 |
| Apr 2024 | 4.0 | $3.00 |
| Jul 2019 | 4.0 | $1.70 |