| Sold | Grade | Monthly Average |
| Feb 2026 | 5.0 | $12.25 |
| Jul 2025 | 7.0 | $22.00 |
| Mar 2011 | 6.5 | $11.75 |
| May 2011 | 6.0 | $9.90 |
| Aug 2023 | 5.0 | $45.00 |
| Jul 2012 | 5.0 | $7.90 |
| Jun 2011 | 5.0 | $7.90 |
| Mar 2025 | 4.5 | $11.25 |
| Apr 2022 | 4.0 | $8.80 |
| Jan 2022 | 4.0 | $10.50 |
| Mar 2014 | 4.0 | $6.60 |
| Feb 2014 | 4.0 | $6.60 |
| Sep 2016 | 3.5 | $7.60 |
| Jun 2011 | 3.5 | $5.70 |
| Nov 2014 | 3.0 | $8.40 |
| Nov 2015 | 2.5 | $5.70 |
| Oct 2022 | 2.0 | $4.80 |
| Feb 2020 | 2.0 | $4.80 |
| Sep 2018 | 2.0 | $4.80 |
| Dec 2016 | 2.0 | $4.80 |
| Feb 2013 | 2.0 | $3.60 |
| Aug 2013 | 1.8 | $3.30 |