| Sold | Grade | Monthly Average |
| Nov 2025 | 5.5 | $6.00 |
| Mar 2014 | 9.4 | $6.50 |
| Jan 2014 | 9.4 | $6.15 |
| Nov 2013 | 9.4 | $6.55 |
| Oct 2013 | 9.4 | $6.55 |
| Sep 2013 | 9.4 | $5.76 |
| Aug 2013 | 9.4 | $4.94 |
| Jul 2013 | 9.4 | $5.49 |
| Jun 2013 | 9.4 | $5.49 |
| Feb 2013 | 9.4 | $5.86 |
| Dec 2012 | 9.4 | $5.22 |
| Nov 2012 | 9.4 | $5.49 |
| Jul 2012 | 9.4 | $4.70 |
| Jun 2024 | 8.0 | $8.00 |
| Apr 2022 | 8.0 | $7.60 |
| Dec 2021 | 8.0 | $8.00 |
| Sep 2021 | 6.5 | $6.49 |
| Aug 2014 | 6.0 | $4.80 |
| Nov 2021 | 5.5 | $4.00 |
| Sep 2016 | 4.0 | $3.80 |
| Aug 2016 | 4.0 | $3.80 |
| May 2023 | 3.0 | $3.00 |