| Sold | Grade | Monthly Average |
| Oct 2013 | 7.5 | $8.50 |
| Nov 2021 | 4.5 | $16.00 |
| Nov 2020 | 4.0 | $7.60 |
| Aug 2013 | 4.0 | $7.20 |
| Aug 2022 | 3.5 | $6.40 |
| May 2014 | 3.5 | $4.84 |
| May 2021 | 2.5 | $4.56 |
| May 2019 | 2.5 | $5.70 |
| Jan 2022 | 2.0 | $4.00 |
| Dec 2020 | 2.0 | $3.60 |
| Apr 2020 | 2.0 | $4.75 |
| Jun 2019 | 1.8 | $4.18 |
| Jun 2015 | 1.5 | $3.20 |
| Jan 2014 | 1.5 | $2.80 |