| Sold | Grade | Monthly Average |
| Aug 2026 | 1.5 | $3.00 |
| Jan 2019 | 5.0 | $7.90 |
| May 2024 | 4.0 | $6.60 |
| Jan 2015 | 4.0 | $9.90 |
| Sep 2011 | 4.0 | $6.90 |
| Mar 2019 | 3.0 | $4.60 |
| Apr 2015 | 3.0 | $7.45 |
| Dec 2009 | 3.0 | $5.20 |
| Jan 2017 | 2.5 | $3.79 |
| Dec 2012 | 2.5 | $4.49 |
| Feb 2017 | 2.0 | $3.30 |
| Apr 2013 | 2.0 | $3.52 |
| Sep 2024 | 1.8 | $2.60 |