| Sold | Grade | Monthly Average |
| Nov 2025 | 2.5 | $4.30 |
| Dec 2018 | 6.5 | $12.75 |
| Jan 2022 | 5.5 | $9.70 |
| Jun 2011 | 5.5 | $9.70 |
| Jan 2011 | 5.0 | $8.60 |
| Aug 2018 | 4.0 | $7.20 |
| Jul 2010 | 4.0 | $6.60 |
| Jan 2018 | 3.5 | $6.25 |
| Jul 2012 | 3.0 | $5.00 |
| Nov 2011 | 2.0 | $3.60 |
| Nov 2010 | 1.0 | $1.99 |
| Apr 2010 | 1.0 | $1.80 |
| Apr 2017 | 0.5 | $1.70 |