| Sold | Grade | Monthly Average |
| Nov 2009 | 9.2 | $50.00 |
| Dec 2017 | 6.5 | $23.00 |
| Sep 2010 | 6.5 | $26.00 |
| Sep 2025 | 6.0 | $20.00 |
| May 2018 | 6.0 | $21.00 |
| Apr 2012 | 6.0 | $23.65 |
| Apr 2025 | 5.5 | $16.50 |
| Oct 2016 | 5.0 | $15.00 |
| Aug 2012 | 5.0 | $15.00 |
| Mar 2025 | 4.0 | $20.00 |
| Oct 2021 | 4.0 | $12.00 |
| Nov 2010 | 1.8 | $1.80 |