| Sold | Grade | Monthly Average |
| Feb 2026 | 4.5 | $89.99 |
| Mar 2014 | 4.5 | $4.75 |
| Aug 2017 | 4.0 | $9.25 |
| Aug 2016 | 4.0 | $6.00 |
| Jan 2015 | 4.0 | $5.00 |
| Mar 2012 | 4.0 | $4.00 |
| Apr 2023 | 3.5 | $60.00 |
| Aug 2022 | 3.5 | $4.80 |
| Jul 2011 | 3.5 | $3.49 |
| Aug 2020 | 3.0 | $3.99 |
| Sep 2017 | 3.0 | $5.25 |
| Dec 2015 | 3.0 | $4.60 |
| Feb 2018 | 2.5 | $3.42 |
| May 2016 | 2.5 | $3.99 |
| May 2022 | 2.0 | $3.00 |
| Aug 2018 | 2.0 | $3.00 |
| Oct 2010 | 2.0 | $2.20 |
| Jul 2025 | 1.5 | $2.38 |