愛一個人好難 by WILLIAM SO (蘇永康) has sold 0 copies on streaming services.
愛一個人好難 certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of |
| Total sales | 0 | Album-equivalent unit |
Total
Sales: 0
Album-equivalent unit
|
Year-end chart performance for 愛一個人好難
| Chart 1999 | Rank | Sales |
 Taiwanese Albums |
5 | 500,000 |