| Sold | Grade | Monthly Average |
| Sep 2025 | 7.0 | $36.00 |
| Sep 2025 | 6.0 | $35.00 |
| Oct 2025 | 4.5 | $21.50 |
| Oct 2025 | 2.0 | $9.12 |
| Mar 2020 | 7.0 | $37.00 |
| Aug 2012 | 6.0 | $18.75 |
| Nov 2020 | 5.5 | $31.50 |
| Jul 2017 | 5.5 | $19.00 |
| Feb 2025 | 5.0 | $23.50 |
| Jan 2019 | 4.5 | $19.25 |
| Dec 2014 | 3.5 | $13.25 |
| May 2022 | 3.0 | $11.64 |
| May 2017 | 3.0 | $9.80 |
| May 2016 | 2.5 | $8.40 |
| Sep 2011 | 2.5 | $7.49 |
| Oct 2018 | 2.0 | $8.70 |
| May 2018 | 1.8 | $6.70 |
| May 2013 | 1.0 | $3.49 |
| Sep 2010 | 1.0 | $3.32 |