| Sold | Grade | Monthly Average |
| Sep 2017 | 5.0 | $22.00 |
| May 2018 | 3.5 | $19.50 |
| Jan 2016 | 2.5 | $9.70 |
| Dec 2022 | 2.0 | $14.00 |
| Jul 2013 | 2.0 | $13.20 |
| Jul 2012 | 2.0 | $12.00 |
| Jun 2020 | 1.8 | $7.20 |
| May 2020 | 1.8 | $7.20 |
| Mar 2015 | 1.8 | $10.05 |
| Jan 2020 | 1.0 | $4.90 |
| Jul 2013 | 1.0 | $7.00 |
| Dec 2012 | 0.5 | $3.85 |
| Jun 2011 | 0.5 | $3.49 |