| Sold | Grade | Monthly Average |
| Jan 2026 | 0.5 | $2.65 |
| Sep 2023 | 7.5 | $45.00 |
| May 2025 | 6.0 | $34.00 |
| Aug 2017 | 6.0 | $18.50 |
| Jan 2014 | 5.0 | $10.10 |
| Feb 2012 | 5.0 | $8.60 |
| Aug 2024 | 4.0 | $7.70 |
| Apr 2022 | 4.0 | $6.40 |
| Mar 2021 | 4.0 | $8.00 |
| Apr 2012 | 4.0 | $9.00 |
| Sep 2011 | 4.0 | $8.00 |
| Apr 2010 | 4.0 | $8.00 |
| May 2017 | 3.0 | $6.10 |
| Sep 2022 | 2.5 | $3.80 |
| Jan 2019 | 2.5 | $5.20 |
| Feb 2017 | 2.5 | $5.20 |
| Jun 2014 | 2.5 | $7.60 |
| Jul 2015 | 2.0 | $5.99 |
| Jun 2011 | 2.0 | $4.40 |
| Nov 2022 | 1.0 | $1.80 |