| Sold | Grade | Monthly Average |
| Dec 2025 | 7.5 | $7.49 |
| Jan 2012 | 9.4 | $3.40 |
| Nov 2021 | 8.0 | $8.00 |
| Mar 2021 | 8.0 | $8.00 |
| Nov 2014 | 8.0 | $2.40 |
| May 2010 | 8.0 | $0.90 |
| Mar 2010 | 8.0 | $0.90 |
| Jul 2008 | 8.0 | $2.80 |
| May 2006 | 8.0 | $2.52 |
| Sep 2021 | 6.5 | $6.49 |
| Feb 2015 | 6.0 | $1.80 |
| Dec 2012 | 6.0 | $2.15 |
| Aug 2012 | 6.0 | $1.80 |
| Sep 2011 | 6.0 | $1.80 |
| Aug 2020 | 4.0 | $4.00 |
| Dec 2013 | 4.0 | $1.20 |
| Mar 2013 | 4.0 | $1.20 |
| Feb 2012 | 4.0 | $1.30 |
| May 2025 | 3.0 | $3.00 |