| Sold | Grade | Monthly Average |
| Apr 2026 | 6.5 | $16.50 |
| Jul 2025 | 4.0 | $3.20 |
| Nov 2024 | 4.0 | $17.50 |
| Jul 2021 | 4.0 | $13.00 |
| Feb 2019 | 4.0 | $7.00 |
| Jan 2013 | 4.0 | $7.00 |
| Feb 2026 | 3.0 | $6.30 |
| Feb 2025 | 3.0 | $8.40 |
| Dec 2024 | 3.0 | $9.60 |
| Jul 2025 | 2.5 | $3.20 |
| Mar 2025 | 2.5 | $5.80 |
| Feb 2021 | 2.0 | $7.65 |
| Oct 2024 | 1.5 | $2.70 |
| Apr 2018 | 1.0 | $1.62 |
| Feb 2024 | 0.5 | $4.70 |